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 one.
A) 170	B) 185	C) 190	D) 198	E) 200
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 ?