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Answer:
You have a 50% chance of picking a multiple of 3.
Step-by-step explanation:
If we include 1 and 24 as factors of 24, then the possible choices would be:
1, 2, 3, 4, 6, 8, 12, 24
Of those, the only ones that are multiples of 3 are 3, 6, 12 and 24. Meaning that the chance of getting a multiple of 3 is 4/8, or 1/2, i.e. 50%
If we don't include 1 and 23, then we have:
2, 3, 4, 6, 8, 12
and 3, 6 and 12 are divisible by 3.
Which again gives 1/2, or 50%
So regardless of whether 1 and 24 are included, the chance of picking a multiple of three from the factors of 24 is 50%.