Question 6
EasyOriginal questionA fair die is thrown. Given that the number is odd, what is the probability that it is prime?
Show the answer and explanation
CorrectNot quiteAnswer C
Correct answer: C
Explanation
Odd: 1, 3, 5.
Of these, 3 and 5 are prime (1 is not): .
Worth noting
1 counts 1 as a prime; a prime has exactly two factors.
- Concept
- Conditional probability by counting
- Typical timeTypical
- 60 s
- Your timeYours
- —
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Ten questions from Conditional Probability & Bayes' Theorem, at your own pace.