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2.4.12 Calculate probabilities from a Normal distribution (A-level only)

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Question 12

Scores on a professional certification exam are modeled by a normal distribution.

15% of candidates score lower than 60 marks. 10% of candidates score higher than 85 marks.

Calculate the mean and standard deviation of the scores.

[6]
Markscheme

2.4.12 Calculate probabilities from a Normal distribution (A-level only) Questions

  1. A Level
  2. /Maths
  3. /2.4.12 Calculate probabilities from a Normal distribution (A-level only)

147 exam-style questions on OCR (MEI) A Level Maths 2.4.12 Calculate probabilities from a Normal distribution (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.

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