MCQ practice · SSC Higher Mathematics Board questions · Chapter 14: Probability
What is the probability of not getting a 4 when a dice is thrown?
Think it through first, then pick an option.
- a 1/6
- b 1/2
- c 2/3
- d 5/6
Answer and explanation
Correct answer: d 5/6
The outcomes other than 4 number 5; equivalently 1 − 1/6. 5 favourable out of 6; P = 5/6.
Why the other options are wrong
- a 1/6: 1/6 is the probability that the event does not happen (1 − 5/6); the question asks for the event happening, which is 5/6.
- b 1/2: Not 1/2: there are 5 favourable outcomes out of 6, so the probability is 5/6.
- c 2/3: Not 2/3: there are 5 favourable outcomes out of 6, so the probability is 5/6.
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