140k views
0 votes
If rob flips 3 coins what is the chance that they come up all tails

User Willll
by
7.6k points

2 Answers

4 votes
One way you could solve this would be to write out all the possible ways the 3 coins could land. There are 8 different arrangements.

H-H-H
H-H-T
H-T-H
H-T-T
T-T-T
T-T-H
T-H-H

You can see that there is 1 possible way that the coins give you the result you asked for; three tails. So that's 1 out of 8.. 1/8 = 0.125 = 12.5%
User Runa
by
8.3k points
4 votes
1/8. 1/2*1/2*1/2 = 1/8. Each 1/2 represents the probability of getting tails on each flip. We multiply three of them because there are three flips.
User Pokisutra
by
8.3k points
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories