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2 Unit 2: Applied Mathematics A

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Question 112

A manufacturer claims that 15% of its batteries fail before 500 cycles. A laboratory tests 40 batteries and models the number N N\,N of early failures as binomial.

a.

State the distribution used under the claim.

[1]
b.

Find P(N=4)P(N=4)P(N=4).

[2]
c.

State two assumptions about the testing needed for the model.

[2]
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2 Unit 2: Applied Mathematics A Questions

  1. A Level
  2. /Maths
  3. /2 Unit 2: Applied Mathematics A

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