1.

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

Answer»


ANSWER :(i) `(""^(20)C_(5))/(""^(60)C_(5))` (ii) `1 - (""^(30)C_(5))/(""^(60)C_(4))`


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