Question

Find the sum of 7 numbers whose mean is 22

tell me fastt​

Answer 1

Answer:

154

Step-by-step explanation:

Let, 'a' and 'b' be the first and last number respectively.

Mean(AM) = 22

Sum of 7 numbers(S7)= ?

We know,

AM=(a+b)/2

or, 22 = (a+b)/2 --------(i)

Now,

Sn = n[(a+b)/2]

or, S7 = 7[(a+b)/2] -------(ii)

Put value of (a+b)/2 in (ii),

S7 = 7 * 22

∴S7 = 154

The sum of 7 numbers whose mean is 22 is 154.