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I would appreciated if you helped me work through the answer so I can solve similar the questions?

 

 

Coco flips a penny, a nickel, and a quarter. Each coin is fair (meaning that heads and tails are equally likely to come up). What is the probability that at least one of the coins comes up heads?

Enter your answer as a fraction in simplified form.

 May 13, 2023
 #1
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There can be 0, 1, 2, or 3 heads.  Therefore, the probability that at least one of the coins comes up heads is 3/4.

 May 13, 2023
 #2
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[3 C 1] + [3 C 2] + [3 C 3] ==[3 + 3 + 1] ==7 / 2^3 ==7 / 8 - probability of at least 1 head.

 May 13, 2023
 #3
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Oh thanks, but what does the "C" stand for? Thanks so much for the help!!

 May 17, 2023

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