A) 14
B) 15
C) 16
D) 17
Correct Answer: B
Solution :
Mean of 20 observations =15 \[\therefore \] Sum of 20 observations \[=15\times 20=300\] Replacing 3 and 14 by 8 and 9 will mean that \[3+14=17\] is replaced by \[8+9=17\]. Hence there will be no effect on the sum. It will still remain 300, so the mean will not change and will remain 15.You need to login to perform this action.
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