CBSE > Class 10 > Mathematics | CBSE Board | Homework Help

Median can be found by a method which has a formula... median= l+(n/2-F÷f)h. l is the lower limit of the median class (when class intervals are given) n= summasion of all frquencies F=cumulative frequency of the class preceeding the median class f=frequency of median class and h= class width.

0Thank You

Abhinav ? 6 years, 1 month ago

Median is a measure of central tendency which gives the value of the middle most observation in the data. For finding the median you firstly have to arrange the data in the ascending order and in a frequency distribution table. Then apply the formula: if n is odd then median will be(n+1)/2 th observation. If n is even then median will be average of n/2 and (n/2+1). And the median fpr the grouped data can be find out by : median= l+(n/2-cf/f)×h. Here l =lower limit, n=number of observations, cf= cumulative frequency of class preceding the median class, f= frequency, h = class size.

3Thank You

ANSWER

Find the cost of painting four walls of a room of dimension 9*8.5*10 a₹50per square foot

Posted by Pawan Kumar 6 years, 1 month ago

CBSE > Class 10 > Mathematics

2 answers

Sonam Jadhav 6 years, 1 month ago

₹17500

0Thank You

Pawan Kumar 6 years, 1 month ago

Am: ₹ 17500

0Thank You

ANSWER

if we are given the ratio to construct similar triangle then how we will decide to chosse if i have to take frist numerator or first denominator.

Posted by Raj Kumar Raj 6 years, 1 month ago

CBSE > Class 10 > Mathematics

3 answers

Nandini Kumari Gupta 6 years, 1 month ago

Numerator

1Thank You

Sakshi Jain 6 years, 1 month ago

First take denominator

0Thank You

Naruto Uzumaki??? 6 years, 1 month ago

I think its numerator. But not confirmed still...

0Thank You

ANSWER

Find the discrimininant of the following quadratic equation 3x²-4

Posted by Anitha P 6 years, 1 month ago

CBSE > Class 10 > Mathematics

2 answers

Sidharth ($Id) 6 years, 1 month ago

√48

2Thank You

⛩️Singh Empire? (Believe In Study) 6 years, 1 month ago

4√3

0Thank You

ANSWER

Find mode of the given data 3,3,7,4,5,6,8,9,5,3,5,3,6,9,7,4

Posted by Sakina Suwasrawala 6 years, 1 month ago

CBSE > Class 10 > Mathematics

3 answers

Dolly Singh 6 years, 1 month ago

0Thank You

Sidharth ($Id) 6 years, 1 month ago

1Thank You

⛩️Singh Empire? (Believe In Study) 6 years, 1 month ago

1Thank You

ANSWER

Two tangents TP and TQ are drawn to a circle with centre O from an external point T.Prove that angle PTQ=2 angle OPQ

Posted by Otaku Also Should Study 6 years, 1 month ago

CBSE > Class 10 > Mathematics

1 answers

Sia ? 6 years, 1 month ago

We know that, the lengths of tangents drawn from an external point to a circle are equal.
{tex}\therefore {/tex} TP = TQ
In {tex}\triangle{/tex}TPQ,
TP = TQ
{tex}\Rightarrow{/tex} {tex}\angle{/tex}TQP = {tex}\angle{/tex}TPQ ...(1) (In a triangle, equal sides have equal angles opposite to them)
{tex}\angle{/tex}TQP + {tex}\angle{/tex}TPQ + {tex}\angle{/tex}PTQ = 180º (Angle sum property)
{tex}\therefore {/tex}2 {tex}\angle{/tex}TPQ + {tex}\angle{/tex}PTQ = 180º (Using(1))
{tex}\Rightarrow{/tex} {tex}\angle{/tex}PTQ = 180º – 2 {tex}\angle{/tex}TPQ ...(1)
We know that, a tangent to a circle is perpendicular to the radius through the point of contact.
OP {tex}\perp{/tex} PT,
{tex}\therefore {/tex} {tex}\angle{/tex}OPT = 90º
{tex}\Rightarrow{/tex}{tex}\angle{/tex}OPQ + {tex}\angle{/tex}TPQ = 90º
{tex}\Rightarrow{/tex} {tex}\angle{/tex}OPQ = 90º – {tex}\angle{/tex}TPQ
{tex}\Rightarrow{/tex} 2{tex}\angle{/tex}OPQ = 2(90º –{tex}\angle{/tex}TPQ) = 180º – 2 {tex}\angle{/tex}TPQ ...(2)
From (1) and (2), we get
{tex}\angle{/tex}PTQ = 2{tex}\angle{/tex}OPQ

0Thank You

ANSWER

A girl twice as old as her sister. Four years hence the product of the ages will be 160.find the present age.

Posted by Shivani Bhuyan 6 years, 1 month ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

If p(e) =0•05, what is the probability of not 'e'?

Posted by Chandan Kumar 6 years, 1 month ago

CBSE > Class 10 > Mathematics

1 answers

Sia ? 6 years, 1 month ago

Since, P(E) + P (not E) = 1

P (not E) = 1 - P(E) = 1 - 0.05 = 0.95

1Thank You

ANSWER

Trignometry ncert chapter 8.4 queston 5

Posted by Adil Rashid 6 years, 1 month ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

I love trigo

Posted by Tannu ? 6 years, 1 month ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

Basic proportionally theorem

Posted by Yangchen Sherpa 6 years, 1 month ago

CBSE > Class 10 > Mathematics

3 answers

Tannu ? 6 years, 1 month ago

Maths ki book m h dwkh lena

0Thank You

Amirtha Varsha 6 years, 1 month ago

btp

0Thank You

Sidharth ($Id) 6 years, 1 month ago

It states that if a line drawn parallel to a side of traingle which intersects the other 2 sides into 2 distinct points, then the line divides those sides in proportion.

3Thank You

ANSWER

Sabse mushkil chapter konsa lagata h????

Posted by Dhruv Sharma 6 years, 1 month ago

CBSE > Class 10 > Mathematics