Question

The average of 11 numbers is 53. if the average of  first 6 numbers is 50 and that of last 6 is 55 then the 6 number is

Answer 1

Answer:

Ans. 47

Step-by-step explanation:

let the no.s be n1, n2, n3, ........, n11.

As per question, (n1 + n2 + n3 +.....+ n11)/11 = 53   ----(1)

and (n1 + n2 + n3 +.....+n6)/6 = 50   ----(2)

also (n6 + n7 + n8 +....+n11) = 55      ----(3)

Adding (2) and (3)...

(n1 + n2 + n3 +.....+ n11)/6 + n6/6 = 105

(53×11)/6 + n6/6 = 105

n6 = 47