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Maths Puzzle
Out of a box that contains 4 black and 6 white balls, three are randomly chosen. What is the
probability that all three will be black?
Read Solution (Total 3)
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- probability that all three will be black = (4/10)*(3/9)*(2/8) = 1/30
- 12 years agoHelpfull: Yes(4) No(1)
- 1/30 is the probability that all three will be black.
Total number of balls = 4Black + 6White = 10balls
Out of 10,
Probability of 1st ball will be black = 4/10= 2/5
Probability of 2nd ball will be black = 3/9 = 1/3
Probability of 3rd ball will be black = 2/8 = 1/4
Probability of all three balls will be black = (2/5)*(1/3)*(1/4) = 1/30 - 12 years agoHelpfull: Yes(3) No(0)
- (4c3)/(10c3)
- 12 years agoHelpfull: Yes(2) No(2)
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