self Maths Puzzle

A single letter is selected at random from the word 'PROBABILITY'. The probability that it is a vowel is..??

A.2/11 B.3/11 C.4/11 D. 0

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self Other Question
Find the greatest number of five digits, which is exactly divisible by 7, 10, 15, 21 and 28. If 4log(4*5^2) = x, find x