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A bag contains 3 red, 4 black and 2 white balls. What is the probabili
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09 Nov 2022, 06:27
09 Nov 2022, 06:27
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Question Stats:
20% (02:42) correct
80% (00:55) wrong based on 10 sessions
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A bag contains 3 red, 4 black and 2 white balls. What is the probability of drawing a red and a white ball in two successive draws, each ball being put back after it is drawn?
(A) 2/27
(B) 1/9
(C) 1/3
(D) 4/27
(E) 2/9
(A) 2/27
(B) 1/9
(C) 1/3
(D) 4/27
(E) 2/9
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Free Materials for the GRE General Exam - Where to get it!!
GRE Geometry Formulas
GRE - Math Book
Re: A bag contains 3 red, 4 black and 2 white balls. What is the probabili
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10 Nov 2022, 20:37
10 Nov 2022, 20:37
1
You can multiply the probably to choosing a red ball and a white ball together, then take the permutation of the draws.
(3/9)*(2/9)=2/27. Since there are 2 permutations, (2/27)=(4/27). So answer D.
(3/9)*(2/9)=2/27. Since there are 2 permutations, (2/27)=(4/27). So answer D.
gmatclubot
Re: A bag contains 3 red, 4 black and 2 white balls. What is the probabili [#permalink]
10 Nov 2022, 20:37
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