Ranting About School Math Teachers

Algebra Level 3

Only 2 5 \frac{2}{5} of all school math teachers can identify when a math word-problem represents a situation in which you'd want to divide a whole number by a fraction. A room of randomly selected school math teachers contains 21 teachers who can correctly identify such problems. Of the given options, how many school math teachers are most likely in the room?

53 teachers 105 teachers 21 teachers 105 2 \frac{105}{2} teachers

Zandra Vinegar by Zandra Vinegar

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1 solution

Sonveer Yadav
Dec 19, 2015

Let there be 'T' teachers then 2/5 of the teachers identify such problems which is given to be 21 i.e 2/5 ×T = 21

2T = 5×21=105.

T = 105/2 ~ 53 (no of teachers can't be in fraction)

1 Helpful 0 Interesting 0 Brilliant 0 Confused

What about part-time teachers? You know, 52 full-time + 1 part-time teachers = 105 / 2 105/2

Michael Mendrin - 5 years, 5 months ago

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Yes, why don't part time teachers count?

Razzi Masroor - 2 years, 2 months ago

I agree you

A Former Brilliant Member - 5 years, 5 months ago

I'm the 53rd solver. I must be that 53rd teacher who is one of the 21 lol.

James Wilson - 5 months ago

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