MCQ practice · SSC Higher Mathematics Board questions · Chapter 14: Probability
What is the probability of getting at most two H when two fair coins are tossed together?
Think it through first, then pick an option.
- a 0
- b 1/4
- c 3/4
- d 1
Answer and explanation
Correct answer: d 1
With two coins the number of H is always 2 or fewer, so all four outcomes are favourable. 4 favourable out of 4; P = 4/4 = 1.
Why the other options are wrong
- a 0: 0 is the probability of an impossible event; here every outcome is favourable, so the event is certain and the probability is 1.
- b 1/4: Not 1/4: every outcome is favourable, so favourable and total are equal and the probability is 1.
- c 3/4: Not 3/4: every outcome is favourable, so favourable and total are equal and the probability is 1.
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