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2.4 N: Statistical distributions

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Question 80

The random variable X X\,X has the distribution X∼B(25,0.36)X \sim B(25, 0.36)X∼B(25,0.36).

a.

Find the mean of XXX.

[1]
b.

Find the variance of XXX.

[1]
c.

Find P(X≥10)P(X \ge 10)P(X≥10).

[2]
Markscheme

2.4 N: Statistical distributions Questions

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

390 exam-style questions on AQA A Level Maths 2.4 N: Statistical distributions, covering 2.4.1 Discrete distributions and the binomial, 2.4.2 The Normal distribution (A-level only), and 2.4.3 Selecting an appropriate distribution (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.

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