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Sub 505 Level|   Probability|      
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Bunuel
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There are 9 beads in a bag. 3 beads are red, 3 beads are blue, and 3 b 04 Jan 2021, 21:00
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B
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5% (low)

Question Stats:

89% (01:01) correct 11% (01:03) wrong based on 55 sessions

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There are 9 beads in a bag. 3 beads are red, 3 beads are blue, and 3 beads are black. If two beads are chosen at random, what is the probability that they are both blue?

A. 1/81

B. 1/12

C. 2/9

D. 1/4

E. 1/3
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B
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There are 9 beads in a bag. 3 beads are red, 3 beads are blue, and 3 b 04 Jan 2021, 21:14
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\(P = \frac{^3C_2}{^9C_2}=\frac{1}{12}\)

Ans B
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There are 9 beads in a bag. 3 beads are red, 3 beads are blue, and 3 b 04 Jan 2021, 22:57
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We have 3 Red, 3 Blue, and 3 black beads.
Probability of getting first blue bead = 3/9
Probability of getting a second blue bead = 2/8

Probability of (Aand B) = 3/9*2/8 = 1/3*1/4 = 1/12

Answer B
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There are 9 beads in a bag. 3 beads are red, 3 beads are blue, and 3 b 06 Jan 2021, 06:32
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Bunuel
There are 9 beads in a bag. 3 beads are red, 3 beads are blue, and 3 beads are black. If two beads are chosen at random, what is the probability that they are both blue?

A. 1/81

B. 1/12

C. 2/9

D. 1/4

E. 1/3
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There will be two consecutive pick-up.

\(\frac{3}{9}*\frac{2}{8}=\frac{1}{12}\)

The answer is B
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