# Word Problems & Probability

## Problems on Percentage & Numbers

Problems of the first degree on percentage and numbers**more...**

## Problems on Geometric Shapes & Motions

Problems of the first degree dealing with geometrical shapes and uniform motion**more...**

## Probability - First Steps

The fundamental principle of counting • Sample space • Event as a subset • Probability of an event • Disjoint events • Probability of the union of two events • Independent events and probability of the intersection • Complementary events • Union of non-disjoint events • Conditional probability • Tree diagrams**more...**

## Probability - Advanced Topics

Sampling with/without replacement • Permutations • Combinations • Bernoulli trials • Binomial distribution • Random variable, mean and standard deviation • Standardized variable z • The normal curve**more...**