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Number properties:- Is the product of all the elements in Se

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by sachin_yadav » Sat Jan 29, 2011 8:04 am
Source:- "MGMAT"

Hi All,

Please help in the following D.S question:-

Is the product of all of the elements in Set S negative ?

(1) All of the elements in Set S are negative.
(2) There are 5 negative numbers in Set S.

Answer is C
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Source: — Data Sufficiency |
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by maihuna » Sat Jan 29, 2011 8:29 am
A: All elem neg, -1, -2, -3 will result in -6, -1, -2 in 2, so not suff
B: 5 nos are negative, what abt other's, if there is 0, it will be 0 not negative, if all other pos, it will be neg, so not suff

combine : all 5 nos are negative, odd no of negative will result in negative
Charged up again to beat the beast :)
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by sachin_yadav » Sat Jan 29, 2011 12:18 pm
maihuna wrote:A: All elem neg, -1, -2, -3 will result in -6, -1, -2 in 2, so not suff
B: 5 nos are negative, what abt other's, if there is 0, it will be 0 not negative, if all other pos, it will be neg, so not suff

combine : all 5 nos are negative, odd no of negative will result in negative
Thank you so much for your reply. I got confused with the second one. Actually i just thought that there are only 5 negative numbers in set S and ignored that there can be other numbers too, which prompted me to select B.
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