Question

If the mean of 6, 8,5,X,4,7,8 is 7 , Find X ​

Answer 1

Step-by-step explanation:

Mean= sum of all observation/ No. of observations

mean = 7

6+8+5+X+4+7+8 / 7= 7

28 + x/ 7 = 7

28 + x = 49

x = 49- 28

x = 21