Question

The mean of 7 numbers is 11.five of the numbers are 3,17,20,4 and 15. The remaining two numbers are each equal to y. Find
i)the sum of 7 no
ii) the value of y​

Answer 1

Step-by-step explanation:

mean means sum of observation /number of observation...

Value of y:

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

7

59+2y =11

7

59+2y=77

2y=77-59

2y=18

y=9

Sum of 7 numbers:

3+17+20+4+15+9+9=77

Hope this helps you