Mean of the data x1, x2, x3, x4, x5 is 15. If each observation is multiplied 3 then the mean becomes
A. 5
B. 45
C. 18
D. 12
Answer:B
Mean of the data x1, x2, x3, x4, x5 is 15. If each observation is multiplied 3 then the mean becomes
A. 5 B. 45 C. 18 D. 12