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Question 192

A delivery company records whether each parcel arrives late. The probability that any parcel is late is modelled as 0.14, independently of every other parcel. A random sample of 45 parcels is taken, and X X\,X is the number that arrive late.

a.

State two conditions required for X X\,X to have a binomial distribution.

[2]
b.

Find P(X=6)P(X = 6)P(X=6).

[1]
c.

Find P(5≤X≤9)P(5 \le X \le 9)P(5≤X≤9).

[2]
Markscheme

2 Statistics Questions

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

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