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Mathematics · 2026 · 3 marks
CBSE 2026 · Region 1 · Set 3 · Q29
Two different coins are tossed simultaneously. What is the probability of getting :(i)at least one head ?(ii)at most one tail ?(iii)a head and a tail ?
Two different coins are tossed simultaneously. What is the probability of getting :
(i)
at least one head ?
(ii)
at most one tail ?
(iii)
a head and a tail ?
Marking-scheme solution
Possible Outcomes are HH, HT, TH, TT
(i) \(\displaystyle \mathrm{P}\) (at least one head) \(\displaystyle =\frac{3}{4}\)
(ii) \(\displaystyle \mathrm{P}(\) at most one tail) \(\displaystyle )=\frac{3}{4}\)
(iii) P (a head and a tail) \(\displaystyle =\frac{2}{4}\) or \(\displaystyle \frac{1}{2}\)
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CBSE Class 10 Mathematics past-paper question from the 2026board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.