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2.4 Statistical distributions

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Question 8

Let X∼B(20,0.3)X\sim B(20,0.3)X∼B(20,0.3).

a.

Calculate P(X≤3)P(X\leq3)P(X≤3).

[2]
b.

Calculate P(X≥5)P(X\geq5)P(X≥5).

[2]
c.

Explain why the two answers do not add to 1.

[1]
Markscheme

2.4 Statistical distributions Questions

  1. A Level
  2. /Maths
  3. /2.4 Statistical distributions

47 exam-style questions on WJEC A Level Maths 2.4 Statistical distributions, covering 2.4.1 Statistical distributions, 2.4.2 Statistical distributions, and 2.4.3 Statistical distributions. Each one has a worked solution and a mark scheme showing where the marks go.

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