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A. What is the probability that if 3 letters are typed, no letters are repeated? B....

A. What is the probability that if 3 letters are typed, no letters are repeated?

B. Six coins are tossed. Find the probability of at least 3 heads?

C. What is the probability that a 7-digit phone number contains at least one 2? (Repetition of numbers and lead zero are allowed).

Math   Statistics-And-Probability   
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