If 4 consecutive letters are selected at random from the English alphabet, then the probability that one of the letters is a vowel is ?  Choose the correct choice from the following choices.
A) 13/23
B) 16/23
C) 11/23
D) 17/23
E) 18/23
Total no. of ways of selecting 4 consecutive letters =&gt; 23 [Like abcd, bcde, efgh,..etc]   No. of ways of having one is a vowel =&gt; 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   ANSWER:17/23
<result>D</result>
If 4 consecutive letters are selected at random from the English alphabet, then the probability that one of the letters is a vowel is ?