CBSE > Class 11 > Mathematics | CBSE Board | Homework Help

A. In A part there is a sample space is of 8 and there is only one case in which no head is appear means only tails comes in every case (T,T,T) SO, the answer is 1/8 B. For an event exactly one head appear So for this cases are Head appears in first tossed (H,T,T) Head appears in second tossed(T,H,T) Head appears in third tossed(T,T,H) SO, the answer is 3/8 C.For an event atleast two heads Cases are (H,H,T) (T,H,H) (H,T,H) (H,H,H) Atleast means kam se kam So there are four cases 4/8 =1/2 For exclusive probability of common part is zero And exhaustive event probability of union is equal to sample sapce.

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Ex 2.3 q. 2

Posted by Ansh Awasthi Awasthi 5 years, 3 months ago

CBSE > Class 11 > Mathematics

1 answers

Kritika Gupta 5 years, 3 months ago

Subscribe the YouTube channel subject teacher it is very good channel for maths exercise questions......

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Set of all x such that x=2x+1

Posted by Jerry S 5 years, 3 months ago

CBSE > Class 11 > Mathematics

1 answers

Jerry S 5 years, 3 months ago

By solving we get x=-1So set A={-1}

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formulan of straight line

Posted by Yash Doyal 5 years, 3 months ago

CBSE > Class 11 > Mathematics

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Let S={1,2,3

Posted by Jerin Binu 5 years, 3 months ago

CBSE > Class 11 > Mathematics

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The sum of two numbers is 6 times their geometric mean, show that numbers are in ratio (3+2roor2):(3-2root2)

Posted by Ruthik Karmanchi 5 years, 3 months ago

CBSE > Class 11 > Mathematics

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1+√2 belongs to (1,3) is it true or false

Posted by Florence Heikham 5 years, 3 months ago

CBSE > Class 11 > Mathematics

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Defferentiate among (2,3),[2,3),(2,3]

Posted by Florence Heikham 5 years, 3 months ago

CBSE > Class 11 > Mathematics

1 answers

Manju Patwa 5 years, 3 months ago

( this means only smaller than or greater than but ] this means smaller than, greater than as well as equal to also So (2,3) x is greater than 2 but smaller than 3 . [2,3) x is greater than or equal to 2 but smaller than 3 (2,3] x is greater than 2 but smaller than or equal to 3

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2α+2β=5αβ/2

Posted by Harsh Pandit 5 years, 3 months ago

CBSE > Class 11 > Mathematics

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If tan (A+B) = 3 tan A then show that sin(2A+B) = 2 SinB

Posted by Rahul Shakya 5 years, 3 months ago

CBSE > Class 11 > Mathematics

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Principal solution of sinx=√3/2

Posted by Mahak Agrawal 5 years, 3 months ago

CBSE > Class 11 > Mathematics

2 answers

Manju Patwa 5 years, 3 months ago

As sinx is positive in only two quadrants they are- In first or second quadrant so it has two principal solution 1- π\3 (60°) or 2- 2π\3 (120°)

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Virender Singh 5 years, 3 months ago

X - 60

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Domain of function root x

Posted by Arya Bhardwaj 5 years, 3 months ago

CBSE > Class 11 > Mathematics

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In how many ways can the letters of NITROGEN be arranged if the 1words starts with 'N 'and ends with 'G' 2 vowels occur together

Posted by Yanshika Choudhary 5 years, 3 months ago

CBSE > Class 11 > Mathematics

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Functioning of sin wave n how it is creates

Posted by Shreya Dubey 5 years, 3 months ago

CBSE > Class 11 > Mathematics

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Find the principal and general solution of tan x root 2

Posted by Rajibul Khan 5 years, 3 months ago

CBSE > Class 11 > Mathematics

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If a={1,2,4} b={2,4,5} c={2,5} then find (a-c) × (b-c)

Posted by Rishiba Rishi 5 years, 3 months ago

CBSE > Class 11 > Mathematics

2 answers

Virender Singh 5 years, 3 months ago

{1,4},{4,4}

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Priyanshu Sharma 5 years, 3 months ago

a - c = { 1,4} b - c = {4} a - c × b - c = {1,4} , {4,4}

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in survey of 85 families it is found that 35 read hindi newspaper 28 read marathi 32 read english 12 read hindi and marathi 15 read hindi and english 5 read all the three .Find the following. 1- number of families reading at least one newspaper. 2- number of families reading exactly on newspaper.

Posted by Atharv Sharma 5 years, 3 months ago

CBSE > Class 11 > Mathematics

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1-i

Posted by Neeraj Ve 5 years, 3 months ago

CBSE > Class 11 > Mathematics

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In a circle of diameter 40 cm the length of the chord is 20 cm find the length of the minor arc of the chord

Posted by Manas Gupta 5 years, 3 months ago

CBSE > Class 11 > Mathematics

2 answers

Diksha Payal 5 years, 3 months ago

This question is very simple

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Ravindra Meena 5 years, 3 months ago

It's an easy question so you will try again ???

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An aeroplane takes off at past ten instead of half past four.BY how many minutes has it been delayed

Posted by Ram Panda 5 years, 3 months ago

CBSE > Class 11 > Mathematics

1 answers

Sadul Sharma 5 years, 3 months ago

12 minutes

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1. If find the values of and

Posted by Priyanshu Rai 5 years, 3 months ago

CBSE > Class 11 > Mathematics

0 answers

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Conver radians into degrees use pi as 22/7 ques 9pi/5

Posted by Mahadevan Mahadev 5 years, 3 months ago

CBSE > Class 11 > Mathematics

2 answers

Mahadevan Mahadev 5 years, 2 months ago

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Puja Mahato 5 years, 2 months ago

Calculate the angle of (a) 1 degree (b ) 1 degree ( c) 1" in redians use 360 in rad 1°=60°and 1°=60° .

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Solve |x|<5

Posted by Mehak Gupta 5 years, 3 months ago

CBSE > Class 11 > Mathematics

1 answers

Himanshu Chauhan 5 years, 3 months ago

Right

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Show that the point A (1,-1,3),B (2,-4,5),C(5,-13,11) are collinear

Posted by Vatsal Kantariya 5 years, 3 months ago

CBSE > Class 11 > Mathematics

1 answers

Vivek Kumar 5 years, 3 months ago

1/2[ x1(y2-y3) + x2(y3-y1) + x3(y1-y2) ] = 0 (if the points are colinear) put the values & check

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If A={1, 2,3,} and B={2, 3} Find A×B

Posted by Swathi Udayakumar 5 years, 3 months ago

CBSE > Class 11 > Mathematics

3 answers

Suryakant Swain 5 years, 3 months ago

{(1,2),(1,3),(2,2), (2,3),(3,2), (3,3)}

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Prachi Janwani 5 years, 3 months ago

Answer = {(1, 2), (2, 2), (3, 2), (1, 3), (2, 3), (3, 3) }

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Monika Panghal 5 years, 3 months ago

{(1,2),(1,3),(2,2),(2,3),(3,2),(3,3)} This is your answer

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convert 40 degree 20 minutes into radian measure

Posted by Varsha Parthiban 5 years, 3 months ago

CBSE > Class 11 > Mathematics

1 answers

Yogita Ingle 5 years, 3 months ago

Before going to do this problem we must know the following ideas
1. 180 degrees = Pi radians
2. 1 degree = Pi/ 180 radians
3. 1 degree = 60 minutes
1/3 degrees = 20 minutes

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union ka MATLAB

Posted by Youtube Technical Baba 5 years, 3 months ago

CBSE > Class 11 > Mathematics