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 Math Coin Flipping Problem

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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 17, 2016

Best Answer 

 #2
avatar+36916 
+6

Here are the POSSIBILITIES

hhh

hht

hth

htt

ttt

tth

tht

thh      Seven possibilities have an h     out of 8     

 

So:    7/8       ( or  87.5%)

 May 17, 2016
edited by ElectricPavlov  May 17, 2016

4+0 Answers

 #1
avatar
-1

The probability of getting at least one head from flipping 3 coins is:(1/2)^3=1/8

 May 17, 2016
 #2
avatar+36916 
+6
Best Answer

Here are the POSSIBILITIES

hhh

hht

hth

htt

ttt

tth

tht

thh      Seven possibilities have an h     out of 8     

 

So:    7/8       ( or  87.5%)

ElectricPavlov May 17, 2016
edited by ElectricPavlov  May 17, 2016
 #3
avatar
+6

The probability of getting at least 1 head is: [3C1 +3C2 +3C3]=3+3+1=7 Combinations

Since we have: 2^3=8 Total number of possibilities, then the probability is=7/8

 May 17, 2016
 #4
avatar
0

Thank you so much!

 Feb 22, 2017

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