| No | Description | Difficulty | Syllabus | Level | |
|---|---|---|---|---|---|
| 1 | Given P(A) and P(A and B) find P(B|A); 2NI | Easy | A-level | S1 | Related material |
| 2 | selecting 2 marbles with replacement find P(2nd is black); 2NI | Easy | A-level | S1 | Related material |
| 3 | selecting 2 marbles with replacement; find P( at least 1 is black); 2NI | Easy | A-level | S1 | Related material |
| 4 | selecting 2 marbles with replacement; find P(both are black); 2NI | Easy | A-level | S1 | Related material |