Question

(d)
16. The mean weight of coroup of tho items is 29 and that
of anther group of niterns is 3. The mean of
combined group of 10+n items is found to be 30. The value of n is
(a) 2
b) 4
(c) 10
(d) 12​

Answer 1

I think so 12 one time you try to ask your teacher