question_answer

Mean of 11 observations is 17.5. If one observation value 15 is deleted, then the mean of remaining observations is ____.

A)  15.75                          

B)  16.75  

C)         17.75              

D)         18.75              

Correct Answer: C

Solution :

Mean of 11 observations = 17.5 Sum of 11 observation = 192.5 Now, 15 is deleted from the data. Sum of 10 observations =177.5 Mean of remaining of observations