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प्रश्न
A coin is tossed three times. Find P (A/B) in each of the following:
A = At most two tails, B = At least one tail.
उत्तर
Consider the given events.
A = At most two tails
B = At least one tail
Clearly,
A = {(T, T, H), (T, H, H), (H, H, T), (T, H, T), (H, H, T), (H, T, T), (H, H, H)}
B = {(T, T, T), (T, T, H), (T, H, H), (H, H, T), (T, H, T), (H, H, T), (H, T, T)}
\[\text{ Now } , \]
\[A \cap B = {(T, T, H), (T, H, H), (H, H, T), (T, H, T), (H, H, T), (H, T, T)} \]
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