A random variable X X\,X has the probability function:
P(X=x)=x+127x=1,2,3,4,5,6 P(X=x) = \frac{x+1}{27} \quad x = 1, 2, 3, 4, 5, 6 P(X=x)=27x+1x=1,2,3,4,5,6Construct a table giving the probability function of X X\,X and the cumulative distribution F(x)F(x)F(x), and find P(1.4<X<3.9)P(1.4 < X < 3.9)P(1.4<X<3.9).
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.