1(iv)
A letter is chosen at random from all the letters of the English alphabets. The probability that the letter chosen is a vowel, is :
- (a)$\frac{4}{26}$
- (b)$\frac{5}{26}$
- (c)$\frac{21}{26}$
- (d)$\frac{5}{24}$
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All the letters of English alphabets have 5 vowels (a, e, i, o and u) and total number of English alphabets = 26.
Probability that letter chosen is a vowel = $\frac{\text{No. of vowels}}{\text{No. of alphabets}} = \frac{5}{26}$.
Hence, Option 2 is the correct option.