There are 4680 gym members in total. 3 8 are aged 25 - 59 years, 2 5 are over 60 years and the remainder are under 25 years.

1053 members under 25 years.
Step-by-step explanation:
We have been given the total number of students: 4680

That means in 25-59 there will be:

And
That means over 60 years will be:

That means from total 1755+1872=3627
That means 4680-3627=1053 are remaining
And hence, 1053 members are under 25 years.