Question

65. The mean weight of a group of 10 items is 29 and that of anther group of n items 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

Answer:

[b] 4

Step-by-step explanation:

combined mean

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