16. Jeruto was born when her mother

was 27 years old and her father was

30 years old. After how many years

will the mean age of Jeruto and her

parents be 26 years?

If the mean age of Jeruto and her parents is 26,

the total age of 3 of them must be 26x3 = 78

27 + 30 = 57 (current total ages of her parents)

78 - 57 = 21 (remaining number of years all of them need to age)

since there are 3 of them, they age 3 years in 1 year.

21 / 3 = 7

answer = 7 more years.