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Algebra 7 Online
OpenStudy (anonymous):

Explain how Pascal's triangle can be used to find the probability that exactly 4 tails will appear when a coin is tossed 6 times. Help me :(

OpenStudy (anonymous):

I do not whether i can help or not, first, i want you check whether the answer of probability is 15. if it is right, i will give you the explanation, if not. I 'm sorry, I cannot help

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