Question

In jungle one year monkey population increased in a ratio of 8:7 but the next year it is decreased in the ratio of 16:17.Tell how many monkeys were in jungle after 2years if there were 2975 monkeys ?

Answer 1

Population of monkeys after 2 years = 3200

Explanation:

Total number of monkeys at the start = 2975

Increase ratio of monkey population one year =
`8:7`

∴ New population of monkeys after 1 year=
`Total\ population * Increase\ ratio = 2975* (8)/(7) =3400`

Decrease ratio the next year =
`16:17`

∴ Population of monkeys after 2 years=
`New\ population * Decrease\ ratio = 3400* (16)/(17) =3200`