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Numerical Ability
Permutation and Combination
Two people are playing with a pair of dice. Instead of numbers, the dice have different colors on their sides. The first person
wins if the same color appears on both the dice and the second person wins if the colors are different. The odds of their winning
are equal. If the first dice has 5 red sides and 1 blue side, find the colour(s) on the second one.
Read Solution (Total 3)
-
- Let no of red sides in second dice = x
No of blue sides = 6-x
Now since their odds are equal
(5/6)X(x/6)+(1/6)X((6-x)/6)=(5/6)X((6-x)/6)+(1/6)X(x/6)
=>x=3
So No. of red and blue faces on second dice will be equal i.e. 3 - 14 years agoHelpfull: Yes(8) No(1)
- The second dice has 3 red sides and 3 blue sides.
- 14 years agoHelpfull: Yes(1) No(2)
- The second dice has 5 blue sides & 1 red sides.
- 14 years agoHelpfull: Yes(1) No(7)
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