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

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Question 54

The time, $T$ minutes, required for a specific bacterial culture to double in population is modelled by a normal distribution such that $\sim \text{N}(\mu, \sigma^2)$ .

Given that $P (T < 145) = 0.74$ , determine:

$P (T > 145)$

[1]

$P(μ<T<145)P(\mu < T < 145)$

[2]

$\mu \mid T < 145)$

[2]

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 54

The time, $T$ minutes, required for a specific bacterial culture to double in population is modelled by a normal distribution such that $\sim \text{N}(\mu, \sigma^2)$ .

Given that $P (T < 145) = 0.74$ , determine:

$P (T > 145)$

[1]

$P(μ<T<145)P(\mu < T < 145)$

[2]

$\mu \mid T < 145)$

[2]

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.