Theory > Mathematics > 2016 > SECTION I > 4 > b
WASSCE
| Scores | 1 | 2 | 3 | 4 | 5 | 6 |
| Frequency | 25 | 30 | x | 28 | 40 | 32 |
The table shows the outcome when a die is thrown a number of times. If the probability of obtaining a 3 is 0.225:
calculate the probability that a trial chosen at random gives a score of an even number or a prime number.
(Leaving the answer in fraction a/b)
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