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One-fifth of the students at a nursery school are 4 years

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VP
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One-fifth of the students at a nursery school are 4 years [#permalink]

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New post 18 Apr 2005, 22:12
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One-fifth of the students at a nursery school are 4 years old or older. If 16 students have not yet reached their third birthday, and a total of 40 students are not between 3 years old and 4 years old, how many children are in the nursery school?

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New post 18 Apr 2005, 23:20
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120 students

40 students are not between 3 and 4 years. 16 students are under 3 years and so 24 are over 4 years. 24 is 1/5 of the total number of students. so 24 times 5 is 120.
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New post 19 Apr 2005, 02:49
got the same result with the same reasoning
120
mmmm...where's the trick?

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New post 19 Apr 2005, 10:35
120 for me too...
here is how i did it...

let X be number of students.

1/5 (X) > 4yrs

16< 3yrs

40 <>3 and 4 yrs.

in other words 1/5(x)+16=40!

solve for X and we get 120.

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Re: One-fifth of the students at a nursery school are 4 years [#permalink]

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New post 03 Dec 2017, 02:59
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Re: One-fifth of the students at a nursery school are 4 years   [#permalink] 03 Dec 2017, 02:59
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