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The Normal Distribution

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Question 231

An autonomous drone delivery service observes that the probability of a drone failing to land within the designated landing zone is 0.08.

a.

Find the probability that, in a random sample of 50 landings, fewer than 3 drones fail to land in the designated zone.

[3]
b.

The service completes 800 deliveries over the course of a weekend.

Using a suitable approximation, estimate the probability that more than 75 drones fail to land in the designated zone.

[5]

The Normal Distribution Questions

  1. A Level
  2. /Maths
  3. /The Normal Distribution

Practise Edexcel A Level Maths The Normal Distribution with exam-style questions for A Level Maths. 439 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