UGC NET Computer Science Permutations and Combinations Previous Year Question Paper and Solution with PDF

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Qus : 1 UGC NET Computer Science PYQ

In a pack of 42 cards, 3 cards are chosen one after the other without replacement. Find the number of ways this can be done:

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2
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4
Go to Discussion

Since the cards are drawn “one after the other” and order matters, we use permutations:
Number of ways = \( ^{42}P_3 = 42 \times 41 \times 40 \).

Compute: \( 42 \times 41 = 1722 \), and \( 1722 \times 40 = 68880 \).

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