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2 Statistics

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Question 179

Independent trials have success probability ppp. The probability of at least one success in four trials is 0.5904.

a.

Find ppp.

[3]
b.

Find the probability of exactly two successes in four trials.

[2]
c.

In 250 sets of four trials, find the expected number with exactly two successes.

[1]
Markscheme

2 Statistics Questions

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

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