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deona.glaustwengePosted - 16 February 2015 16:21  Show Profile
The answer provided to the first question is WRONG!

If 1/4 of the partrons are male and 1/5 of the patrons are from out of town how many...are both?

The answer is 1/5. They claim it is 1/20 but for that to be true the question would have to be phrased "If 1/4 are male and 1/5 of THOSE are from out of town how many are both male and from out of town.

Somebody is not paying attention.

kristie.hartig Posted - 15 March 2015 19:23  Show Profile
no, the answer is 9/20. Because 1/4 are x, 1/5 are y, so what is x and what is y. We have to begin with the lowest possible total number of people, which is 20 for example. 1/4 are x so x+5 and 1/5 are y so y = 4. x + y = 9 so 9/20 are both.
kristie.hartig Posted - 15 March 2015 19:25  Show Profile
so... if the question HAD been 1/4 are x and 1/5 of x is y, the correct answer would have been: 6/20 and therefore 3/10. (1/4 of 20 is 5 so x = 5, and 1/5 of x = y which = 1, 5 + 1 is 6 out of 20, which reduces to 3 out of 10.
kristie.hartig Posted - 15 March 2015 19:28  Show Profile
oops on my first reply it was probably confusing because I had a + where I meant to put an = sign. Here is what I meant to say: no, the answer is 9/20. Because 1/4 are x, 1/5 are y, so what is x and what is y. We have to begin with the lowest possible total number of people, which is 20 for example. 1/4 are x so x = 5 and 1/5 are y so y = 4. x + y = 9 so 9/20 are both.

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