Questions
Cards are drawn one-by-one at random from a well-shuffled pack of 52 playing cards until 2 aces are obtained
from the first time. The probability that 18 draws are required for this is
detailed solution
Correct option is C
18 draws are required for 2 aces. This means in the first 17 draws, there is one ace and 16 other cards, and 18thdraw produces an ace. so, the required probability is 48C16×4C1 52C17×335=56115925Similar Questions
The odd against an event are 5 to 2 and the odds in favour of another disjoint event are 3 to 5. Then the probability that atleast one of the events will happen is
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