Problem set

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yongy: Newbie | Next Rank: 10 Posts; Posts: 1; Joined: Fri Oct 12, 2012 5:18 am

by yongy » Fri Oct 12, 2012 5:20 am

Hi everybody I have a problem set I can't solve please help me.

There are 200 pilots work in 747 fleet. If part of them like golf 2/3 and 3/5 like Jogging, how many people like golf but don't like jogging ?

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Source: Beat The GMAT — Problem Solving | Fri Oct 12, 2012 5:20 am

Jim@StratusPrep: MBA Admissions Consultant; Posts: 2279; Joined: Fri Nov 11, 2011 7:51 amFollowed by: 266 members; Location: New York; Thanked: 660 times; GMAT Score:770

by Jim@StratusPrep » Fri Oct 12, 2012 6:30 am

A + B - A&B must equal 1 here.

2/3 + 3/5 - X = 1

10/15+ 9/15 - x = 15/15

-x = -4/15

x = 4/15

Subtract this from the total golf number:

10/15 - 4/ 15 = 6/15 or 2/5

2/5 of 200 = 80

(Note: this question is a bit off though because 2/3 of 200 would give you a fraction and you can't have a fraction of a person)

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