Question

The mean of 7 numbers is 11. Five of the numbers are 3, 17, 20, 4 and 15. The remaining 2 numbers are equal to y. Find

(i) the sum of the 7 numbers,
(ii) the value of y.​

Answer 1

Answer:

Step-

3+17+20+4+15+y+y /7 =11

59+2y=77

2y=77-59

2y=18

y=9

1) the sum of seven numbers = 3+17+20+4+15+9+9= 77