Question

A family of 5 members has a mean age of 32. After 2 years, grand mother dies at the age of 64. What will be the mean age of remaining members after 5 years from now?

Answer 1

a family has 5 members: mean age is 32.
therefore, total age = 5 * 32 = 160 years

after 2 years the total age will be = (2*5)+160 = 170 years
 grandmother dies in 64 year.

therefore, new age total = 170 - 64 = 106 years

total age after 5 years = (4 * 5) + 106 = 20 + 106 = 126
new mean age = 126/4 = 31.5 years

Answer 2

Answer:

a family has 5 members: mean age is 32.

therefore, total age = 5 * 32 = 160 years

after 2 years the total age will be = (2*5)+160 = 170 years

 grandmother dies in 64 year.

therefore, new age total = 170 - 64 = 106 years

total age after 5 years = (4 * 5) + 106 = 20 + 106 = 126

new mean age = 126/4 = 31.5 years