Latest CTS Aptitude Question SOLUTION: If fourconsecutive letters are selected at random from the English alphabet, then the probability that one of the letters is a vowel is ? Options 13/23 16/23 11/23 17/23

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If fourconsecutive letters are selected at random from the English alphabet, then the probability that one of the letters is a vowel is ?

Options
13/23
16/23
11/23
17/23

Asked In CTS ABHINAV PUSHPAM (8 years ago)

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vaibhav hadole  (8 years ago)

Total no. of ways of selecting 4 consecutive letters => 23 [Like abcd, bcde, efgh,..etc]
No. of ways of having one is a vowel => abcd, bcde, cdef, defg, efgh, fghi, ghij, hijk, ijkl, lmno, mnop, nopq, opqr, rstu, stuv, tuvw, uvwx...
= 17
P(one of letter is vowel) = 17/23

Ans : 17/23

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