Question

The average age of 7 members of a family is 39 years. If grandfather is 63 years old, then the average age of remaining members is:
(a) 35 years
(b) 36 years
(c) 34 years
(d) 30 years​

Answer 1

Answer:

35 years

Step-by-step explanation:

(age 1 + age 2 + age 3 + age 4 + age 5 + age 6 + age 7) / 7 = 39

age 1 + age 2 + age 3 + age 4 + age 5 + age 6 + 63 = 39*7

age 1 + age 2 + age 3 + age 4 + age 5 + age 6 = 273 - 63

age 1 + age 2 + age 3 + age 4 + age 5 + age 6 = 210

Avg of 6 people = 210/6 = 35 years