Subject
Quantitative Aptitude
Topic
Probability
Radha tossed three unbiased coins. What is the probability of getting at least 2 heads?
Radha tossed three unbiased coins. What is the probability of getting at least 2 heads?
ক)
1/4খ)
1/2গ)
1/3ঘ)
1/8ঙ)
None of theseExplanation
On tossing three coins, n(S) = 2 × 2 × 2 = 8 Sample space = {HHH, HHT, HTH, HTT, THH, THT, TTH, TTT} (∵ H = head, T = tail) Number of events with at least two heads, n(E) = 4 ∴ Probability of getting at least 2 heads = n(E)/n(S) = 4/8 = ½Related questions
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