Question

if the mean of p numbers is b and mean of (p+q) numbers is a, the find the mean of q numbers​

Answer 1

as mean of p no = b hence their sum = pb

mean of p+q no = a hence their sum = @(p+q)

now dum of q no = ap+aq-bp

their mean = ap+aq-bp/q = (a-b)p + aq/q

Answer 2

Step-by-step explanation:

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