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Question 84

A discrete random variable $X\,$ has the probability distribution:


$x$	0	1	2	3
$P (X = x)$	$a$	$b$	$c$	$d$

Where $a$ , $b$ , $c\,$ and $d\,$ are constants.

The cumulative distribution $F (x)$ of $X\,$ is given below.


$x$	0	1	2	3
$F (x)$	0.15	0.42	0.74	1

Find the values of $a$ , $b$ , $c\,$ and $d$ .

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Markscheme

Statistical Distributions Questions

A Level
Maths
Statistical Distributions

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.

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