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Probability - Probability Using Possibility Diagrams

Probability - Probability Using Possibility Diagrams

Secondary 4

A letter is selected at random from each of the two words 'EARTH' and 'MARS'.

  1. Construct a possibility diagram showing all the possible outcomes.
  2. Find the probability that
    1. the two letters are the same,
    2. at least one of the two letters is a vowel.

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Answer:(b)(i) 1/10; (b)(ii) 11/20.

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