Ages of members in a family are given as 10 , 20 , 30 , 35 and 40.
What will be mean of their ages after 5 years?

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Solution

The correct option is B 32
Ages of five members are given as 10 , 20 , 30 , 35 and 40.

Average of their ages = $\frac{S u m o f t h e i r a g e s}{N o . o f M e m b e r s}$
= $\frac{10 + 20 + 30 + 35 + 40}{5}$
= 27

After 5 year all ages will exceed by 5 years, So current mean will also exceed by 5 years.

Hence , mean after 5 years = 27 +5 = 32 years

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Ages of members in a family are given as 10 , 20 , 30 , 35 and 40. What will be mean of their ages after 5 years?

Ages of members in a family are given as 10 , 20 , 30 , 35 and 40.
What will be mean of their ages after 5 years?