9709/52 · Oct/Nov 2023

Unknown probabilities from the expectation, then the variance.

Geometric probability, then a binomial probability over a range.

Normal approximation to a binomial.

Back-to-back stem-and-leaf, median and IQR, and comparing spread.

Normal probabilities and a value from a tail probability.

Tree diagram, matching colours and a conditional probability.

Arrangements with restrictions and a probability of a selection.