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Numerical Ability
Probability
A jar contains 2 red, 3 blue, and 4 green marbles. Niki draws one marble from the jar, and then Tom draws a marble. What is the probability that Niki will draw a green marble and Tom will draw a blue marble?
Read Solution (Total 6)
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- 4/9 * 3/8 = 1/6
- 13 years agoHelpfull: Yes(41) No(4)
- the case iz not mention here...tat wether tom is drawing the marble after niki or..or both are drawing at the same tym or tom iz drawing before niki or...whether niki iz placing the marble back into the jar when tom is drawing another marble..different diffrnt answr will come for diffrnt situatn.
- 12 years agoHelpfull: Yes(4) No(8)
- 2 R, 3 B, 4 G, => 9 total
Probability that Nikki picks green = 4/9.
Now, 2 R, 3 B, 3 G => 8 total
Probability that Tom picks blue = 3/8
Probability that Mary picks a blue=1/7.
Both together, multiply the probabilities.
probability that Niki will draw a green marble and Tom will draw a blue marble = ( 4/9 ) * ( 3/8 ) = 1/6 - 8 years agoHelpfull: Yes(4) No(0)
- (4c1)/(9c4)*(3c1)/(8c3) is the correct
- 10 years agoHelpfull: Yes(3) No(1)
- (4c1/9c1)*(3c1/8c1)
- 10 years agoHelpfull: Yes(2) No(0)
- Sol: 4/9 * 3/8
- 8 years agoHelpfull: Yes(0) No(0)
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