# Menu » Probability and clever counting

Please choose the topic you want information about.

**Probability**- Probabilities
- Coincidence variables
- Conditional probabilities and (in)dependence
- Vase model
- Product rule
- Combinations with and without replacing
- Binomial distribution
- Normal distribution

When calculating with probabilities it is important to know the total number of possibilities. How you can calculate this the easiest way, you can find below.

**Clever counting**- Competitions
- Diagram/Grid
- Permutations
- Combinations
- Routes in a grid