Claire flips a coin 6 times. What is the probability that the coin will show tails 3 times?

For exactly 3 tails in 6 flips, choose which 3 of the 6 flips show tails: there are 20 ways. Each sequence of 6 coin flips has probability 1/64, so the probability is 20/64 = 0.3125, which rounds to 0.313. The correct choice is 0.313.

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