A-Level
EDEXCEL
Mathematics & Further Mathematics
May 2018
QP-201805-Mathematics-US1 · Question 4
Question (excerpt):
14 4. A discrete random variable X has probability function P otherwise ( ) , , X x k x k x k x x x x = = − ( ) − ( ) + ( ) ⎧ ⎨ ⎪⎪ ⎩ ⎪ ⎪ = = = 2 3 1 0 0 1 2 3 4 where k is a constant. (a) Show that k …
14 4. A discrete random variable X has probability function P otherwise ( ) , , X x k x k x k x x x x = = − ( ) − ( ) + ( ) ⎧ ⎨ ⎪⎪ ⎩ ⎪ ⎪ = = = 2 3 1 0 0 1 2 3 4 where k is a constant. (a) Show that k …
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