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A lady had fine gloves and hats. 25 blue, 7 red and 9 gey. She had to select a pair among them. But there was no light so she had to select in darkness the correct pair with a glove and a hat. Therefore how many combinations of same color she can select?
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- 25+9+2=36
- 13 years agoHelpfull: Yes(19) No(36)
- If the question was to select at-least 1 pair of each color.
Assume that in the first 2 picks she got pair of blue, in the next 2 picks she got pair of red,in the next 2,pair of gray.
So in total 6 picks she got all the 3 pairs.
But she is in darkness and is not sure what she picked is enough.So to be 100% sure, she considers herself as she picks all blue first(worst case)
.Then all the gray.
So in the next 2 picks she is sure that she got atleast pair of red.
So a total of 25+9+2=36 picks [ans]. - 12 years agoHelpfull: Yes(16) No(3)
- P = 25c2+7c2+9c2/41c2
- 12 years agoHelpfull: Yes(3) No(11)
- 4
1 blue 1 red 1 grey
then next would be either 1b,1r,1g(worst case) - 12 years agoHelpfull: Yes(1) No(10)
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