Math, asked by bibekkachari17, 1 year ago

Correct answer will be marked as the brainliest.

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Answers

Answered by Vinayak333
0
Using the Direct method
Mean = sum of fixi ÷ sum of fi
By solving, sum of fixi = 518+18p
and sum of fi = 30+p putting the values
17.45=518+18p ÷ 30+p
523.5+17.45p=518+18p
523.5-518=18p-17.45p
5.5=0.55p
so, p=5.5÷0.55
p=10

Answered by siddhartharao77
3
Xi = 15,16,17,18,19,20.

Fi = 3,8,10,P,5,4.

Now,

∑FiXi = 45, 128, 170, 18P, 95, 80.

        = 518 + 18P.


∑Fi = 30 + P

Given Mean = 17.45.

17.45 = 518 + 18P/30 + P

523.5 + 17.45P = 518 + 18P

 17.45P - 18P = 518 - 523.5

-0.55P = -5.5

P = 5.5/0.55

P = 10.


Therefore the value of P = 10.


Hope this helps!

siddhartharao77: Any doubts. Ask me. Gud luck!
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