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The surnames of 40 children in a class arranged in alphabetical order. 16 of the ...

The surnames of 40 children in a class arranged in alphabetical order. 16 of the surnames begins with O and 9 of the surname begins with A, 14, of the letters of the alphabet do not appear as the first letter of a surname

What is the probability that the surname of a child picked at random from the class begins with either O or A?

A. 5/8
B. 7/8
C. 9/16
D. 14/25
E. 39/40




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