Question

the average age of a family of 6 members is 22 years. if the age of the youngest member be 7 years, what was the average age of the family at the birth of the youngest member? (a) 15 (b) 18 (c) 21 (d) 12

Answer 1

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

Answer 2

Answer:

correct answer is option (B)