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A box contains 10 red marbles, 20 blue m...

A box contains 10 red marbles, 20 blue marles nad 30 green marbles. 5 marbles are drawn from the box, what is the probability that:
(i) all what be blue?
(ii) at least one will be green?

Text Solution

Verified by Experts

The correct Answer is:
`(""^(20)C_(5))/(""^(60)C_(5))`
(ii)`(""^(30)C_(5))/(""^(60)C_(5))`
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Knowledge Check

  • A bucket contains 8red,3 blue and 5 green marbles . If 3 marbles are drawn at random , what is the probability that none is red ?

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    `(3)/(8)`
    B
    `(1)/(16)`
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    `(11)/(72)`
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    A
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