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Statistical Distributions

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Question 76

In a game 1, 2, 3, 4 or 5 points can be scored. The random variable S S\,S represents the number of points scored.

sss12345
P(S=s)P(S = s)P(S=s)0.050.1250.20.2750.35
P(S=n)=0.05+(n−1)×a P(S = n) = 0.05 + (n - 1) \times a P(S=n)=0.05+(n−1)×a

where a a\,a is a constant.

Find the value of aaa.

[2]
Markscheme

Statistical Distributions Questions

  1. A Level
  2. /Maths
  3. /Statistical Distributions

215 exam-style questions on Edexcel A Level Maths Statistical Distributions, covering 6.1 Probability Distributions, 6.2 The Binomial Distribution, and 6.3 Cumulative Probabilities. Each one has a worked solution and a mark scheme showing where the marks go.

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