The surnames of 40 students in a class were arranged in alphabetical order. 16 of surnames begin with O while 9 of the surnames begin with A. 14 of the letters of the alphabet do not appear as the first letter of any surname.
(i) What is the probability that the surname of a child picked at random from the class begins with either A or O
(ii) If more than one surname begin with a letter besides A or O, how many surnames begin with that letter?
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Asked by henry on 7th March, 2020
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