Question

The average age of 6 members of a
family is 45.5 years. If the age of a
relative is also added, then new average
becomes 47. The age of relative is?​

Answer 1

Answer

the age of relative =45.5-47

=1.5

Answer 2

The age of relative is 56 years

Given :

• The average age of 6 members of a family is 45.5 years.

• If the age of a relative is also added, then new average becomes 47.

To find :

The age of relative

Solution :

Step 1 of 3 :

Find the total age of 6 members

Here it is given that the average age of 6 members of a family is 45.5 years.

Total age of 6 members

= 6 × 45.5 years

= 273 years

Step 2 of 3 :

Find total age of 6 members and relative

It is given that if the age of a relative is also added, then new average becomes 47.

Now total number of persons = 6 + 1 = 7

The total age of 6 members and relative

= 47 × 7 years

= 329 years

Step 3 of 3 :

Find age of relative

Hence the age of relative

= 329 years - 273 years

= 56 years

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