The mean of 50 observations is 200. But later he found that there is decrements of 15 from each observations. what is the the updated mean is ?
Answers:
A) 165  B) 185  C) 190  D) 198  E) 199
185   Answer is 185
<result>B</result>
The mean of 50 observations is 200. But later he found that there is decrements of 15 from each observations. what is the the updated mean is ?