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Mathematics · 2025 · 2 marks
CBSE 2025 · Region 4 · Set 3 · Q24
Renu and Simran were born in the year 2000 which is a leap year. Find the probability that: (i) both have same birthday. (ii) both have different…
Renu and Simran were born in the year $\displaystyle 2000$ which is a leap year. Find the probability that :
(i)
both have same birthday.
(ii)
both have different birthdays.
Marking-scheme solution
Number of days in a leap year = $\displaystyle 366$
(i) \(\displaystyle \mathrm{P}\) (both have same birthday) \(\displaystyle =\frac{1}{366}\)
(ii) P (both have different birthdays) \(\displaystyle =\frac{365}{366}\)
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CBSE Class 10 Mathematics past-paper question from the 2025 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.