Paper 2 · Probability
⏱ Tested in 1 exam question since 2018
Lesson 4 of 9
Probability 4 – Factorials
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- Evaluate factorials and interpret n! as the number of arrangements of n objects
- Use the recursive rule n! = n × (n−1)! to peel factorials apart
- Simplify factorial fractions like (n+2)!/n! by peeling and cancelling
- Explain why 0! = 1
Most recent exam questions
- 2018 P2 Q3(b)
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