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2.4 Statistical Distributions

2.4 Statistical Distributions

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Question 153

Rosa takes basketball free throws. She assumes that each throw is independent and that the probability of success on any throw is 0.3.

a.

Rosa takes 10 throws. Find the probability that at least 4 are successful.

[2]
b.

Rosa takes sets of 10 throws on each of 4 days. Find the probability that at least 4 throws are successful on exactly 2 of the 4 days.

[3]
Markscheme

2.4 Statistical Distributions Questions

  1. A Level
  2. /Maths
  3. /2.4 Statistical Distributions

390 exam-style questions on OCR A Level Maths 2.4 Statistical Distributions, covering 2.4.1 Discrete probability distributions, 2.4.2 Binomial distribution as a model, 2.4.3 Calculating binomial probabilities, 2.4.4 Mean and variance of the binomial (A-level only), 2.4.5 Normal distribution as a model (A-level only), 2.4.6 Probabilities using the normal distribution (A-level only), 2.4.7 Links to histograms, mean and standard deviation (A-level only), and 2.4.8 Selecting an appropriate distribution (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.

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