A-Level
EDEXCEL
Mathematics & Further Mathematics
October 2023
12 Marks
QP-202310-Mathematics-US1 · Question 4
Question (excerpt):
14 4. The discrete random variable X has the following probability distribution. x 1 2 3 4 P(X = x) 1 10 1 5 3 10 2 5 (a) Show that E 1 2 5 X (1) (b) Find Var 1 X (3) The random variable …
14 4. The discrete random variable X has the following probability distribution. x 1 2 3 4 P(X = x) 1 10 1 5 3 10 2 5 (a) Show that E 1 2 5 X (1) (b) Find Var 1 X (3) The random variable …
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