There are 6 cards numbered 1 to 6 , one number on one card. Two cards are drawn at random without replacement. Let X denote the sum of the numbers on the two cards drawn. Then P(X > 3) is: |
$\frac{14}{15}$ $\frac{1}{15}$ $\frac{11}{12}$ $\frac{1}{12}$ |
$\frac{14}{15}$ |
The correct answer is Option (1) → $\frac{14}{15}$ $\text{Total number of outcomes }=\frac{6!}{2!4!}=15.$ $X>3 \text{ except when } X=3.$ $X=3 \text{ only for } (1,2).$ $P(X=3)=\frac{1}{15}.$ $P(X>3)=1-\frac{1}{15}=\frac{14}{15}.$ |