140k views
0 votes
A coin is tossed three times. draw a line from each out come to its probability

A coin is tossed three times. draw a line from each out come to its probability-example-1

2 Answers

3 votes
If you toss a coin 3 times, there are 2³ possible outcomes.
2³ = 8 possible outcomes.

The outcomes are: { HHH, HHT, HTH, THH, TTT, TTH,THT,HTT}

P(3 heads) = 1/8
3 heads outcome is {HHH}

P( exactly 2 heads) = 3/8
Exactly 2 heads= { HHT, HTH, THH }

P(first 2 tosses are head) = 2/8 = 1/4
First 2 tosses are head = { HHH, HHT}

P(at least 2 heads) = 4/8 = 1/2
At least 2 heads = { HHH, HHT, HTH, THH}

User Chris Aung
by
8.2k points
4 votes
I won't say each but I'll say something that will help. think of it as a tree.

First flip. Second flip Third flip

H or T. H or T. H or T

notice there are 6 probabilitys in total and 2 for each flip.
User Ohe
by
7.6k points

No related questions found

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