if you flip three fair coins, what is the probability that youll get heads on the first two flips and tails…

if you flip three fair coins, what is the probability that youll get heads on the first two flips and tails on the last flip?

if you flip three fair coins, what is the probability that youll get heads on the first two flips and tails on the last flip?

Answer

Explanation:

Step1: Determine probability of each flip

The probability of getting heads (H) or tails (T) on a fair - coin flip is $\frac{1}{2}$.

Step2: Use the multiplication rule for independent events

Since coin - flips are independent events, if $A$, $B$, and $C$ are the events of getting heads on the first flip, heads on the second flip, and tails on the third flip respectively, then $P(A\cap B\cap C)=P(A)\times P(B)\times P(C)$. $P(A)=\frac{1}{2}$, $P(B)=\frac{1}{2}$, $P(C)=\frac{1}{2}$. So $P(A\cap B\cap C)=\frac{1}{2}\times\frac{1}{2}\times\frac{1}{2}=\frac{1}{8}$.

Answer:

$\frac{1}{8}$