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A card from a pack of 52 cards is lost. From the remaining 51 cards, n cards are drawn and are found to be spades. If the probability of the lost card to be a spade is 11 50 , the n is equal to

Correct answer

0

Step-by-step solution

n cards are drawn & are found all spade, thus remaining spades =13- x remaining total cards =52- x Now given that P ( lost card is spade )= 11 50 aligned & i.e. ^ 13- n C ₁ ^ 52- n C ₁ = 11 50 & 50(13- n )=11(52- n ) & 39 n =78 & n =2 aligned

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