A-Level
AQA
Mathematics
January 2021
QP-202101-Mathematics-UPSM1 · Question 9
Question (excerpt):
*16* IB/G/Jan21/MA02 outside the box 9 The random variable X ~ B(n, p) has mean 22.5 and variance 12.375 9 (a) Show that p = 0.45 and find the value of n [4 marks] Answer 17 *17* Turn over ► IB/G/Jan2…
*16* IB/G/Jan21/MA02 outside the box 9 The random variable X ~ B(n, p) has mean 22.5 and variance 12.375 9 (a) Show that p = 0.45 and find the value of n [4 marks] Answer 17 *17* Turn over ► IB/G/Jan2…
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