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Quantitative Aptitude

Zonal Theorem

The cops just...

Question

The cops just called you in to solve a difficult mystery. A group of thieves are getting ready to rob the bank, but the cops does not know exactly how many will do the job. There are 40 thieves who are safecrackers or drivers.17 of them are known safecrackers.28 of them are known getaway drivers. The cops know that the group that will rob the bank will be those thieves who are both Safe-crackers and getaway drivers, but they didn't pay attention in math class and can't figure it out. How many people will be in this group?

A

2

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B

5

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C

3

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D

4

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Solution

The correct option is B
5

Total number of thieves = 17+28-40= 45-40 = 5

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