A fair 4 sided spinner has sides numbered 1, 2, 3 and 4.
Write down the name of the distribution that can be used to model the number the spinner lands on from each spin.
The spinner is spun 8 times. The random variable X X\,X represents the number of times the spinner lands on 3. Find the probability that the spinner lands on 3 exactly 2 times.
Given that P(1≤X<a)=0.578P(1 \leq X < a) = 0.578P(1≤X<a)=0.578 correct to 3 significant figures, where a a\,a is an integer, find the value of aaa.
215 exam-style questions on Edexcel A Level Maths Statistical Distributions, covering 6.1 Probability Distributions, 6.2 The Binomial Distribution, and 6.3 Cumulative Probabilities. Each one has a worked solution and a mark scheme showing where the marks go.