If you flip a coin 5 times, what is the probability of getting exactly 3 tails?

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Oct 17, 2015

Answer:

Use the binomial probability distribution.

Explanation:

Assuming a "fair" coin, there are #2^5=32# different arrangements of heads and tails after 5 flips.

Also, there are #""_5C_3= (5!)/(3!2!)=10# ways to get exactly 3 tails.

P(exactly 3 tails) #= 10/32=5/16#

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