Question

The average age of a five member family is 25 years. The age of the youngest member of the family is 10 years. Find the average age of the family just before the birth of the youngest member.
18 years 9 months
21 years 6 months
None of these
20 years 3 months​

Answer 1

Answer:

ans

Step-by-step explanation:

Average age of 6 members  = 22

total = 6*22  =  132

youngest member = 7 years

so total 7 years ago =  132 - 7*6 = 132 - 42 = 90

Average age of family (members will be 5) =  90/5  = 18

average age = 18