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3.2 Finding Probabilities for Normal Distributions

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Question 17

A factory produces bags of flour. The weight of flour, $W$ grams, in a bag can be modelled by a normal distribution with mean 505 grams and standard deviation 4 grams.

Find $P (W < 498)$ .

[2]

Find the value of $w$ such that $P (505 < W < w) = 0.35$ .

[4]

Two bags of flour are selected at random.

Find the probability that exactly one of the bags contains between 505 grams and $w$ grams of flour.

[2]

Markscheme

3.2 Finding Probabilities for Normal Distributions Questions

A Level
Maths
3.2 Finding Probabilities for Normal Distributions

80 exam-style questions on Edexcel A Level Maths 3.2 Finding Probabilities for Normal Distributions. Each one has a worked solution and a mark scheme showing where the marks go.

3.2 Finding Probabilities for Normal Distributions

Question bank

3.2 Finding Probabilities for Normal Distributions

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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52

Question 17

A factory produces bags of flour. The weight of flour, $W$ grams, in a bag can be modelled by a normal distribution with mean 505 grams and standard deviation 4 grams.

Find $P (W < 498)$ .

[2]

Find the value of $w$ such that $P (505 < W < w) = 0.35$ .

[4]

Two bags of flour are selected at random.

Find the probability that exactly one of the bags contains between 505 grams and $w$ grams of flour.

[2]

Markscheme

3.2 Finding Probabilities for Normal Distributions Questions

A Level
Maths
3.2 Finding Probabilities for Normal Distributions

80 exam-style questions on Edexcel A Level Maths 3.2 Finding Probabilities for Normal Distributions. Each one has a worked solution and a mark scheme showing where the marks go.