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find the probability of scoring a total of 7 points (a) once, (b) at least once, (c) twice, in 2 tosses of a pair of fair dice.
three cards are drawn from an ordinary deck of 52 cards. Find the probability that (a) all cards are of one suite, (b) at least 2 aces are drawn.
a pair of dice is tossed repeatdetly. Find the probability that can 11 occurs for the first time on the 6th toss.

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