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Two cards are drawn successively with replacement from a well-shuffled deck of 52 cards. The probability distribution of number of aces is given by:

Solution

✅ Correct Option: 3

Drawing 2 cards with replacement from a deck of 52 cards. After picking the first card, it's returned to the deck before the second draw.

Total cards in deck = 52

Number of aces = 4

Number of non-aces = 48

For any single draw:

P(getting an ace) = 452=113\frac{4}{52} = \frac{1}{13}

P(not getting an ace) = 4852=1213\frac{48}{52} = \frac{12}{13}


For X = 0 (no aces), both cards must be non-aces.

P(X = 0) = P(1st card is not ace) × P(2nd card is not ace)

=1213×1213= \frac{12}{13} \times \frac{12}{13}

=144169= \frac{144}{169}


For X = 1 (exactly one ace), there are two ways:

First card is ace, second card is non-ace:

=113×1213=12169= \frac{1}{13} \times \frac{12}{13} = \frac{12}{169}

First card is non-ace, second card is ace:

=1213×113=12169= \frac{12}{13} \times \frac{1}{13} = \frac{12}{169}

P(X = 1) = 12169+12169\frac{12}{169} + \frac{12}{169}

=24169= \frac{24}{169}


For X = 2 (both aces), both cards must be aces.

P(X = 2) = P(1st card is ace) × P(2nd card is ace)

=113×113= \frac{1}{13} \times \frac{1}{13}

=1169= \frac{1}{169}


The probability distribution is:

x012
P(x)144169\frac{144}{169}24169\frac{24}{169}1169\frac{1}{169}

Therefore, the answer is Option 3.

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