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2 Unit 2: Applied Mathematics A

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Question 20

Let X∼B(n,0.4)X\sim B(n,0.4)X∼B(n,0.4). It is known that P(X=1)=4P(X=0)P(X=1)=4P(X=0)P(X=1)=4P(X=0).

a.

Show that n=6n=6n=6.

[3]
b.

Find P(X≥2)P(X\geq2)P(X≥2).

[2]
c.

State one assumption required if X X\,X counts successful attempts by one player.

[1]
Markscheme

2 Unit 2: Applied Mathematics A Questions

  1. A Level
  2. /Maths
  3. /2 Unit 2: Applied Mathematics A

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