Probability · Total probability theorem
A bag contains coins – fair coins, and one coin with ‘Head' on both sides. A coin is selected at random and tossed. If the probability of getting ‘Head' is , then is equal to:
- (1)5
- (2)7
- (3)8
- (4)9
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See the full 6 Apr 2026, Shift 1 paper
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