Suppose, E is an event of drawing a heart card from a pack of 52 cards.
Hence,
total number of possible outcomes= 52
number of favorable outcomes= number of heart cards= 13
Now,
P (E)=Number of favorable outcomesTotal number of possible outcomes
⇒P (E)=1352=134×13=14
∴ The probability of drawing a heart card from a pack of 52 cards is 14=0.25.