Find the probability for the experiment of tossing a coin two times.Use the sample space $S = \{ H H , H T , T H , T T \}$ .
The probability of getting at least two heads.

A) $\frac { 1 } { 2 }$
B) $\frac { 1 } { 5 }$
C) $\frac { 1 } { 4 }$
D) $\frac { 1 } { 8 }$
E) $\frac { 1 } { 3 }$

Question

Find the probability for the experiment of tossing a coin two times.Use the sample space $S = \{ H H , H T , T H , T T \}$ .  
The probability of getting at least two heads.
 
A) $\frac { 1 } { 2 }$
B) $\frac { 1 } { 5 }$
C) $\frac { 1 } { 4 }$
D) $\frac { 1 } { 8 }$
E) $\frac { 1 } { 3 }$

Quizplus · Accepted Answer

The sample space $S = \{ HH, HT, TH, TT \}$ consists of 4 outcomes. The event of getting at least two heads corresponds to just one outcome: $HH$. Therefore, the probability is $\frac{1}{4}$.

Find the Probability for the Experiment of Tossing a Coin S={HH,HT,TH,TT}S = \{ H H , H T , T H , T T \}S={HH,HT,TH,TT}

Find the Probability for the Experiment of Tossing a Coin $S = \{ H H , H T , T H , T T \}$