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GB-18-01-001 · Single-event probability

A bag contains 25 orange counters, 25 purple counters and 20 white counters. One counter is chosen at random. Find the probability that it is not purple.

Single-Event Probability Application of related method — Booklet p. 60
Method
1) Find total counters and favourable counters
2) Write probability as a fraction and simplify
Worked Example (GB-18-01-001)
1)
45 favourable counters out of 70.
2)
914\frac{9}{14}
Ans = 914\frac{9}{14}