A-Level
EDEXCEL
Mathematics & Further Mathematics
October 2018
QP-201810-Mathematics-US2 · Question 5
Question (excerpt):
16 5. The random variable X has cumulative distribution function given by F( ) ( ) x x ax bx x x x = + + ⎧ ⎨ ⎪⎪ ⎩ ⎪ ⎪ 0 0 1 100 15 0 5 1 5 3 2 - - Given that E(X 2) = 6.25 (a) show that 6a + b = 0 (5)…
16 5. The random variable X has cumulative distribution function given by F( ) ( ) x x ax bx x x x = + + ⎧ ⎨ ⎪⎪ ⎩ ⎪ ⎪ 0 0 1 100 15 0 5 1 5 3 2 - - Given that E(X 2) = 6.25 (a) show that 6a + b = 0 (5)…
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