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2.4.2 The Normal distribution (A-level only)

2.4.2 The Normal distribution (A-level only)

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Question 156

A botanist finds that for a specific species of hybrid orchid, the probability of an individual seed failing to germinate is 0.12.

a.

In a tray containing 50 seeds, find the probability that at least 10 seeds fail to germinate.

[3]
b.

A commercial nursery prepares a large batch of 250 seeds. The batch is classified as 'low yield' if more than 40 seeds fail to germinate.

Use a suitable approximation to calculate the probability that the batch is classified as low yield.

[5]
Markscheme

2.4.2 The Normal distribution (A-level only) Questions

  1. A Level
  2. /Maths
  3. /2.4.2 The Normal distribution (A-level only)

351 exam-style questions on AQA A Level Maths 2.4.2 The Normal distribution (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.

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