Question:
A card is drawn from a deck of 52 cards. Find the probability of getting a king or a heart or a red card.
Solution:
Given total number of playing cards $=52$ $\therefore \mathrm{n}(\mathrm{S})=52$
Total number of king cards $=4$
Total number of heart cards $=13$
Total number of red cards $=13+13=26$
$\therefore$ Favourable outcomes $=4+13+26-13-2$
$=28$
We know that,
Probability $=\frac{\text { Number of favourable outcomes }}{\text { Total number of outcomes }}$
$\therefore$ Required Probability $=\frac{28}{52}$
$=\frac{7}{13}$
$\therefore$ Required Probability $=\frac{28}{52}$
$=\frac{7}{13}$