44-The mean of ten observations is 23. If two observations 4 and 7 are substituted by 3 and 8, then the new value of mean will be
A. 20
B. 19
C. 23
D. 25
Answer:C
44-The mean of ten observations is 23. If two observations 4 and 7 are substituted by 3 and 8, then the new value of mean will be
A. 20 B. 19 C. 23 D. 25