Mathematics S1,S2,S3 WST01: Discrete Random Variables Topical Past Paper Questions
Edexcel A Level Mathematics S1,S2,S3 (WST01) past-paper questions on Discrete Random Variables, free. This topic is frequently examined across 12 exam sessions. Sign in for the full topic-segregated question bank and AI worksheets.
Sample questions
The discrete random variable X has the following probability distribution where $a$ and $b$ are constants. The cumulative distribution function of X is given by where $c$ and $d$ are constants. (a) Find (i) the value of $a$ (ii) the value of $d$ (iii) the value of b (iv) the valu…
The discrete random variable X has probability distribution (a) Find $ F(3.5) $ (1) $$ \mathrm{(b)}\text{Find P}(3X-3 (2) $$ \mathrm{(d)}\text{Show that}\operatorname{Var}(X)=1.1275 $$ $$ \textcircled{e}\operatorname{F i n d}\operatorname{V a r}(5-2X) $$
A spinner can land on the numbers 2, 4, 5, 7 or 8 only. The random variable X represents the number that this spinner lands on when it is spun once. The probability distribution of X is given in the table below. (a) Find $ P(2X-3>5) $ (1) Given that $\mathrm{E}(X)=4.6$ (b) show t…
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