helenskinsley24 helenskinsley24

09-04-2018
Mathematics

contestada

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

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LammettHash LammettHash

09-04-2018

If [tex]x[/tex] is the number of members under 25, then we have

[tex]1800=\dfrac34\cdot1800+\dfrac15\cdot1800+x\implies x=90[/tex]

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