What is the probability of obtaining at least one head in 3 flips of a coin?
A) $\frac { 2 } { 3 }$
B) $\frac{1}{8}$

C) $\frac{7}{8}$
D) $\frac{8}{9}$
E) $\frac { 1 } { 3 }$

Question

What is the probability of obtaining at least one head in 3 flips of a coin?
A) $\frac { 2 } { 3 }$
B) $\frac{1}{8}$

C) $\frac{7}{8}$
D) $\frac{8}{9}$
E) $\frac { 1 } { 3 }$

Quizplus · Accepted Answer

The probability of getting at least one head in 3 flips of a coin is equal to 1 minus the probability of getting all tails. The probability of getting all tails in 3 flips is $\frac{1}{2}\times\frac{1}{2}\times\frac{1}{2} = \frac{1}{8}$. Therefore, the probability of getting at least one head is $1-\frac{1}{8}=\frac{7}{8}$.

What Is the Probability of Obtaining at Least One Head 23\frac { 2 } { 3 }32​

What Is the Probability of Obtaining at Least One Head $\frac { 2 } { 3 }$