Question 3 - A-Level Maths

Exam Board	Edexcel
Module	S1 (Statistics 1)
Year	2012
Session	January
Topic	Discrete Probability Distributions
Type	Probabilities in table form with k

3. The discrete random variable \(X\) can take only the values \(2,3,4\) or 6 . For these values the probability distribution function is given by

\(x\)	2	3	4	6
\(\mathrm { P } ( X = x )\)	\(\frac { 5 } { 21 }\)	\(\frac { 2 k } { 21 }\)	\(\frac { 7 } { 21 }\)	\(\frac { k } { 21 }\)

where \(k\) is a positive integer.