Mathematics
The probability that two boys do not have the same birthday is 0.897. What is the probability that the two boys have the same birthday ?
Probability
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Answer
We know that,
Since, the boys having birthday on same date and different date are complimentary events.
∴ P(do not have the same birthday) + P(having same birthday) = 1
⇒ 0.897 + P(having same birthday) = 1
⇒ P(having same birthday) = 1 - 0.897
⇒ P(having same birthday) = 0.103
Hence, the probability that the two boys have same birthday = 0.103
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