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2 Statistics

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Question 419

Mina attempts two different puzzles. The events that she solves the puzzles are independent. The probability that she solves the second puzzle is 0.70, and the probability that she solves at least one puzzle is 0.88.

a.

Find the probability that Mina solves the first puzzle.

[3]
b.

Find the probability that she solves exactly one puzzle.

[2]
Markscheme

2 Statistics Questions

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

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