# The ten digits 0 to 9 are stamped on 12 discs, there being one digit on a disc and the discs are thoroughly mixed in a box. If a disc is drawn at random, find the probability that the disc has an odd digit on it.

Question: The ten digits 0 to 9 are stamped on 12 discs, there being one digit on a disc and the discs are thoroughly mixed in a box. If a disc is drawn at random, find the probability that the disc has an odd digit on it.

Solution:
Total number of cases = 10.
Total number of favourable cases (1, 3, 5, 7 and 9) = 5
The p = 5/10 or 1/2 or 0.5.

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