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2 Statistics

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Question 197

A software company tests 28 independent features in each release. Each feature has probability 0.32 of failing its first test. A release passes this stage if at most five features fail.

a.

Find the probability that a release passes this stage.

[2]
b.

For 150 releases, find the expected number that fail this stage.

[2]
Markscheme

2 Statistics Questions

  1. A Level
  2. /Maths
  3. /2 Statistics

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