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4.2 Statistical distributions (A-level only)

4.2 Statistical distributions (A-level only)

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Question 126

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

4.2 Statistical distributions (A-level only) Questions

  1. A Level
  2. /Maths
  3. /4.2 Statistical distributions (A-level only)

328 exam-style questions on WJEC A Level Maths 4.2 Statistical distributions (A-level only), covering 4.2.1 Statistical distributions (A-level only), 4.2.2 Statistical distributions (A-level only), and 4.2.3 Statistical distributions (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.

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