Four cards are drawn at random from a standard deck of 52 cards. a. What’s the probability that at least one card is a 7? b. What’s the probability that 3 of the 4 cards are the same suit? c. What’s the probability that they are all the same suit?
Added by Michele G.
Step 1
To find the probability that at least one card is a 7, we can use the complementary probability that none of the cards are a 7. There are 48 cards that are not a 7, so the probability of drawing 4 cards that are not a 7 is: $\frac{48}{52} \times \frac{47}{51} Show more…
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