let A denote the event that the card drawn is king and B denote the event that card drawn is queen.

In a pack of 52 cards, there are 4 king cards and 4 queen cards

Given : P(A) = , P(B) =

To find : Probability that card drawn is king or queen = P(A or B)

The formula used : Probability =

P(A or B) = P(A) + P(B) - P(A and B)

P(A) = (as favourable number of outcomes = 4 and total number of outcomes = 52)

P(B) = (as favourable number of outcomes = 4 and total number of outcomes = 52)

Probability that card drawn is king or queen = P(A and B)= 0

(as a card cannot be both king and queen in the same time)

P(A or B) = + – 0

P(A or B) =

P(A or B)=

Probability of a card drawn is king or queen = P(A or B) =