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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.

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Abhinav ? 6 years, 5 months 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.

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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, 5 months ago

CBSE > Class 10 > Mathematics

2 answers

Sonam Jadhav 6 years, 5 months ago

₹17500

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Pawan Kumar 6 years, 5 months ago

Am: ₹ 17500

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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, 5 months ago

CBSE > Class 10 > Mathematics

3 answers

Nandini Kumari Gupta 6 years, 5 months ago

Numerator

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Sakshi Jain 6 years, 5 months ago

First take denominator

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Naruto Uzumaki??? 6 years, 5 months ago

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

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

Posted by Anitha P 6 years, 5 months ago

CBSE > Class 10 > Mathematics

2 answers

Sidharth ($Id) 6 years, 5 months ago

√48

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⛩️Singh Empire? (Believe In Study) 6 years, 5 months ago

4√3

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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, 5 months ago

CBSE > Class 10 > Mathematics

3 answers

Dolly Singh 6 years, 5 months ago

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Sidharth ($Id) 6 years, 5 months ago

1Thank You

⛩️Singh Empire? (Believe In Study) 6 years, 5 months ago

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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, 5 months ago

CBSE > Class 10 > Mathematics

1 answers

Sia ? 6 years, 5 months 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

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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, 5 months ago

CBSE > Class 10 > Mathematics

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

Posted by Chandan Kumar 6 years, 5 months ago

CBSE > Class 10 > Mathematics

1 answers

Sia ? 6 years, 5 months ago

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

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

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Trignometry ncert chapter 8.4 queston 5

Posted by Adil Rashid 6 years, 5 months ago

CBSE > Class 10 > Mathematics

0 answers

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I love trigo

Posted by Tannu ? 6 years, 5 months ago

CBSE > Class 10 > Mathematics

0 answers

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Basic proportionally theorem

Posted by Yangchen Sherpa 6 years, 5 months ago

CBSE > Class 10 > Mathematics

3 answers

Tannu ? 6 years, 5 months ago

Maths ki book m h dwkh lena

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Amirtha Varsha 6 years, 5 months ago

btp

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Sidharth ($Id) 6 years, 5 months 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.

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Sabse mushkil chapter konsa lagata h????

Posted by Dhruv Sharma 6 years, 5 months ago

CBSE > Class 10 > Mathematics