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How many red marbles?

Expert replies
by Vemuri » Tue Mar 17, 2009 6:26 pm
If each marble in a set of 50 marbles is either red, black or white, how many are red?

1. 25 marbles are not black and 40 marbles are not white
2. There are 15 more black marbles than white marbles, and 5 more red marbles than white marbles.
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Source: — Data Sufficiency |

by cramya » Tue Mar 17, 2009 6:57 pm
I would go wiht D

Stmt II

x-> white marbles

x+x+15+x+5 = 50

Solve for x then for red

Stmt I

40 marbles are not white i.e they are red or black.

10 white

25 not black-> can be red or white

25 black

If 10 are are white out of 25 then 15 has to be red.

SUFF

D
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