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Question
If a letter is chosen at random from the English alphabets {a, b, …, z}, then the probability that the letter chosen precedes x
Options
`12/13`
`1/13`
`23/26`
`3/26`
Solution
`23/26`
Explanation;
Hint:
n(S) = 26
Let A denote the letter chosen precedes x
A = {a, b, c, d, …, x}
n(A) = 23
P(A) = `("n"("A"))/("n"("S")) = 23/26`
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