Question

find the value of if the mean of 3,5,p,17,12and 20 is 15
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Answer 1

Answer:

Mean = Total of all values / No. of values

15 = 57+p/6

15×6 = 57+p

90-57 = p

33 = p

Answer 2

We know mean(m) = sum of the terms / number of terms.

So, sum of terms = number of terms × mean

Given that,

number of terms = 6

mean = 15

So, sum of terms = 6×15 = 90

According to the question the equation is,

3+5+p+17+12+20 = 90

--> p+57 = 90

--> p = 90-57 = 33

So, the value of p is 33