138k views
2 votes
3 coins are flipped. What is the probabilty of getting no heads?

User Knowbody
by
7.2k points

1 Answer

4 votes

Answer: 1/8

=====================================================

Step-by-step explanation:

Assuming a fair coin, the probability of getting tails is 1/2. The probability of getting three tails in a row is (1/2)^3 = (1/2)*(1/2)*(1/2) = 1/8

Put another way, there are 8 possible outcomes when flipping three coins. Those outcomes are:

  1. HHH
  2. HHT
  3. HTH
  4. HTT
  5. THH
  6. THT
  7. TTH
  8. TTT

We see that only one occurrence of TTT shows up out of the eight possible outcomes; therefore, the probability of getting TTT is 1/8

User YTZ
by
5.9k points
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.