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

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Question 30

The 100m race times an athlete records are normally distributed. 16% of the time the athlete is faster than 10 seconds. 23% of the time the athlete is slower than 11 seconds.

Find the mean and standard deviation of the times.

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

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