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Question
If two coins are tossed once, what is the probability of getting both heads or both tails.
Solution
When two coins are tossed together possible number of outcomes = {HH, TH, HT, TT}
n(S) = 4
E = event of getting both heads or both tails = {HH, TT}
n(E) = 2
Probability of getting both heads or both tails = `(n(E))/(n(S)) = 2/4 = 1/2`
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A card is drawn from a well-shuffled pack of 52 playing cards. Find the probability of the event, the card drawn is a red card.
Solution:
Suppose ‘S’ is sample space.
∴ n(S) = 52
Event A: Card drawn is a red card.
∴ Total red cards = `square` hearts + 13 diamonds
∴ n(A) = `square`
∴ p(A) = `square/("n"("s"))` ....formula
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