The average weight of 6 persons is increased by 3 kg when a person of 100 kg comes out of the group and another person takes his place. What is the weight of new person?
Explanation
According to the question
We use the formula,
Value of new observations= a + nb
[here '+' sign (a+nb) has been taken as average increases.]
Here, n=6, a=100 kg, b= 3 kg
Weight of new person = a+nb
= 100+6×3
= 100+18
= 118 kg
Hence, Option C is correct.
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