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Master | Next Rank: 500 Posts
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by smclean23 » Fri Jul 18, 2008 5:18 pm
. The only contents of a parcel are 25 photographs and 30 negatives. What is the total weight, in ounces, of the parcel’s contents?
(1) The weight of each photograph is 3 times the weight of each negative.
(2) The total weight of 1 of the photographs and 2 of the negatives is ounce.
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Source: — Data Sufficiency |
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by iwill » Fri Jul 18, 2008 8:03 pm
My choice is C.

1) INSUFFICIENT . We dont know the individual weight.

2) INSUFFICIENT .The photographs n negatives are not in the ratio 1:2

when combining 1 and 2, it is Sufficient.

Let P be the weight of photograph
and N be the weight of negative.

From 1, we know P = 3N
as per 2, P+2N = 1 ounce.

ie. P+2/3 P = 1.
i.e. P = 3/5 ounce.

and weight one Negative = 1/5 ounce.

This is sufficient to find out 25P+30N
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by raunekk » Fri Jul 18, 2008 9:26 pm
imo:c

thx
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by Mustang » Fri Jul 18, 2008 9:30 pm
C should be correct
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