Putting these in a safe place for later. Found these to be a really good revision questions for integration.
For context, the first one formed part of a question that required me to find the variance of a random variable, and the second one involved having to find the c.d.f. from a p.d.f.
(for my own reference, this was Book 1, Activity 5.2, p. 54 and Activity 6.1, p.62)