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9709/61

Mathematics 9709/61 — October/November 2016

Cambridge A-Level · Probability & Statistics 1 · worked solutions for every part, with the mark scheme

7
questions
50
marks
75
minutes

Topics Probability · The Normal Distribution · Discrete Random Variables · Permutations and Combinations · Representation of Data

Q13MThe Normal DistributionFree sample

The random variable XX is such that X∼N(20,49)X \sim \text{N}(20, 49). Given that P(X>k)=0.25\text{P}(X > k) = 0.25, find the value of kk.

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6 more questions
  • Q2Discrete Random Variables · Probability5M
  • Q3Probability · Discrete Random Variables6M
  • Q4The Normal Distribution8M
  • Q5Permutations and Combinations9M
  • Q6Probability9M
  • Q7Representation of Data10M
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