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 ?  Choose the correct choice from the following answers:
A) 150 B) 185 C) 190 D) 210 E) 220
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 ?