the average age of 6 members of a family is 45.5 years is the age of the letter is also added a new average becomes for the age of relative is
Answers
Answer:
Average age of 6 family member is 25.
∴ Total age of 6 family member =6×25=150years
The age of youngest member is 5years
⇒ Total age of 6 family member at the times of youngest birth =150−(5×6)
=150−30
=120years
∴ Average age of family at time of youngest birth =
6
120
=20years
The age of relative is 56 years
Given : [ Correction in the 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.
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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