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Approximating a Binomial Distribution

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Question 18

In a manufacturing process for specialized solar cells, the probability that a cell is classified as 'High Efficiency' grade is 0.35.

Find the probability that

a.

in a random sample of 8 cells, exactly 2 are classified as High Efficiency.

[2]
b.

in a random sample of 20 cells, the number of High Efficiency cells is more than 10.

[3]
c.

A quality control manager inspects a large delivery of 400 cells.

Using a suitable approximation, determine the probability that the delivery contains fewer than 130 High Efficiency cells.

[4]

Approximating a Binomial Distribution Questions

  1. A Level
  2. /Maths
  3. /Approximating a Binomial Distribution

Practise Edexcel A Level Maths Approximating a Binomial Distribution with exam-style questions for A Level Maths. 68 questions, matched to the Edexcel A Level Maths (9MA0) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.

Question bank