Question

21. In a series of 25 observations, Z (x – 7) = -8. Then,
mean is equal to-
(A) 7
(B) 8
(C) 6.68
(D) 7.68​

Answer 1

the answer is d 7.68 because when we multiply Z and x minus 7 is equals to minus 8 it should be like something 10 or 15 then we divided by 25 and take out many things from it so it should be 7.8 and my all the answer is correct so please mark with brainlest... aur maybe my explanation is wrong but the answer is D one