Tuesday, 11 December 2007

Q3 - Probability

3 My weasels are likely to bit me, scratch me or ignore me. The probabilities are shown below:
Bite Me 0.23
Scratch Me _____
Ignore Me: 0.09
a) What is the probability one scratches me?
b) What is the probability a weasel either bites me or scratches me?
(4 marks)
a) 0.68
b) 0.91

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