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2 Statistics

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Question 456

Each student chooses exactly one of art, drama and music. The probabilities are ppp, p+0.15p+0.15p+0.15 and 2p 2p\,2p respectively.

a.

Find ppp.

[2]
b.

For 480 students, find the expected number choosing each subject.

[3]
c.

Two students are selected independently. Find the probability that both choose music.

[1]
Markscheme

2 Statistics Questions

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

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