Probability of Compound and Sequential Events

Probability of Compound and Sequential Events

Secondary 4

A fair die has the numbers \(1\) to \(6\) and a second fair die has the numbers \(7\) to \(12\). If the two dice are thrown, the score is the last digit in the product of the numbers shown on top of the dice.

  1. Complete the possibility diagram below.
\(1\)\(2\)\(3\)\(4\)\(5\)\(6\)
\(7\)\(7\)
\(8\)\(6\)
\(9\)\(7\)
\(10\)\(0\)
\(11\)\(5\)
\(12\)\(2\)
  1. Find the probability of getting a score that is
    1. a perfect square,
    2. a prime number or a multiple of \(3\),
    3. a common factor of \(30\) and \(42\).

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Answer:(b)(i) 4/9; (b)(ii) 4/9; (b)(iii) 1/3.

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