Exp. (d)
Given, 16x1​+x2​+x3​+…+x16​​=16
⇒∑i=116​xi​=16×16
Sum of new observations
=∑i=118​yi​=(16×16−16)+(3+4+5)=252
Number of observations =18
∴ New mean =18∑i=118​yi​​=18252​=14