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2 Statistics

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Question 94

In each round of a game, a player scores 2 points with probability 0.30, 1 point with probability 0.50, and 0 points otherwise. The scores in two rounds are independent.

a.

Find the probability that the player's total score is at least 3.

[3]
b.

In 400 pairs of rounds, find the expected number for which the total score is at least 3.

[2]
c.

Give one reason why the independence assumption might not hold in practice.

[1]
Markscheme

2 Statistics Questions

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

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