Question

1. Given that the mean of 16, w, 17, 9, x, 2, y, 7 and z is 11, find the mean of
w, x, y and z.​

Answer 1

Answer:

w,x,y,z=12

Step-by-step explanation:

-Sum of 9 data = 9 × mean of 9 data = 9 × 11= 99

-Sum of w,x,y,z = 99 - (16+17+9+2+7)= 99 - 51 = 48

-Therefore, the Mean of w, x, y, z = 48/4 = 12

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