pete and sean decide to raise money for a charity by having a carnival in their backyard. in one of the games that they set up, the probability that a person will win is 0.4. if robyn plays that game nine times, what is the probability that she wins exactly four times?
A)9C5^5 (0.4)^5 (0.4)^5
B)9C4 (0.5)^4 (0.5)^5
C) 9C4 (0.4)^4 (0.6)^5
D)9C5 (0.4)^5 (0.6)^4
and how did you get really confused on probability formula thx

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what does 9C5^5 mean?

oh it's suppose to be 9C5 (0.4)^5 (0.4)^4 sorry

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