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

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Question 5

The weights of sugar bags produced in a factory are normally distributed. 8% of the bags weigh less than 490 g. 12% of the bags weigh more than 510 g.

Find the mean and standard deviation of the weights of the sugar bags.

[6]

Markscheme

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

A Level
Maths
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.

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

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

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Question 5

The weights of sugar bags produced in a factory are normally distributed. 8% of the bags weigh less than 490 g. 12% of the bags weigh more than 510 g.

Find the mean and standard deviation of the weights of the sugar bags.

[6]

Markscheme

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

A Level
Maths
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.