Question
Download Solution PDFAn unbiased coin is tossed 3 times, if the third toss gets head what is the probability of getting at least one more head?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept:
- The number of ways for selecting r from a group of n (n > r) = nCr
- The probability of particular case =
Calculation
If it is known that third toss gets head, the possible cases:
(H, H, H), (H, T, H), (T, H, H), (T, T, H)
∴ Total cases possible = 4
Total favourable cases = 3 [(H, H, H), (H, T, H), (T, H, H)]
So, required probability P =
P =
Last updated on Jun 11, 2025
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