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The total number of cards in an ordinary deck is 52. The sample space is 52.
n(S) = 52
Let A be the event that the card selected is a jack card. Let B be the event that the card selected is diamond card.
n(A) = 4
n(B) = 13
n(A and B) = 1
According to the law of addition;
P(A or B) = P(A) + P(B) - P(A and B)
P(A or B) = 4/52 + 13/52 -1/ 52
P(A or B)= [ 4 + 13 - 1]/52
P(A or B)= 16/52
P(A or B)=0.3077
n(S) = 52
Let A be the event that the card selected is a jack card. Let B be the event that the card selected is diamond card.
n(A) = 4
n(B) = 13
n(A and B) = 1
According to the law of addition;
P(A or B) = P(A) + P(B) - P(A and B)
P(A or B) = 4/52 + 13/52 -1/ 52
P(A or B)= [ 4 + 13 - 1]/52
P(A or B)= 16/52
P(A or B)=0.3077
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