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Question
A two digit number is to be formed using the digits 0, 1, 2, 3. Repetition of the digits is allowed. Find the probability that a number so formed is a prime number.
Solution
Total Outcomes: {10, 12, 13, 11, 20, 21, 22, 23, 30, 31, 32, 33} = 12
Favourable Outcomes: {11, 13, 23, 31} = 4
`P = "Favourable Outcomes"/"Total Outcomes" = 4/12 =1/3`
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