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If two dice are thrown together, the probability of getting an even number on one die and an odd number on the other is -.

  • A.1/4
  • B.1/2
  • C.3/4
  • D.3/5

Answer: B

There are two ways this can happen: even on the first and odd on the second, or the other way round.

\[ P = \frac{3}{6} \times \frac{3}{6} + \frac{3}{6} \times \frac{3}{6} = \frac{1}{4} + \frac{1}{4} = \frac{1}{2} \]

Counting only one arrangement gives \( \tfrac{1}{4} \) - the first option - but the question does not say which die shows which.

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