Question

There are 1800 gym members in total 3/4 are aged 25-59 1/5 are over 60 and the rest are under 25 how many members are under 25

Answer 1

1) 1800 * 3/4 = 1800 : 4 * 3 = 1350 - are 25 - 59
2) 1800 * 1/5 = 1800 : 5 = 360 - are over 60
3) 1800 - 1350 - 360 = 90 - are under 25.

Answer 2

90 members were below 25 years of age.

Explanation:

Total number of members in gym = 1800.

1). Members aged 25 - 59 were
`(3)/(4)of (1800)`

SO number of members of age 25-59 =
`(3)/(4)(1800)`

= 3×450 = 1350

2). Members over 60 years of age =
`(1)/(5)of (1800)`

so number of members over 60 =
`(1800)/(5)=360`

3). Rest are below 25 of age.

Number of members below 25 of age = 1800 - [(members between 25-59) + (members above 60)]

= 1800 - [1350 + 360]

= 1800 - 1710 = 90

Therefore members under 25 ware 90.