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2.4.6 Probabilities using the normal distribution (A-level only)

2.4.6 Probabilities using the normal distribution (A-level only)

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Question 1
48%

A machine produces metal rods whose lengths, LLL, follow a normal distribution. It is found that 15% of the rods have a length less than 15.2 cm and 10% of the rods have a length greater than 16.5 cm.

Find the mean and standard deviation of the rod lengths.

[6]
Markscheme

2.4.6 Probabilities using the normal distribution (A-level only) Questions

  1. A Level
  2. /Maths
  3. /2.4.6 Probabilities using the normal distribution (A-level only)

147 exam-style questions on OCR A Level Maths 2.4.6 Probabilities using 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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