In how many ways can a 4-letter word be formed from the letters ABCDEFIO such that the word contains 2 vowels and 2 cons

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In how many ways can a 4-letter word be formed from the letters ABCDEFIO such that the word contains 2 vowels and 2 consonants? The letters cannot be repeated, and, the words can have no dictionary meaning.

A) 36
B) 144
C) 288
D) 864
E) 1728

Answer: D

Source: e-GMAT
Source: — Problem Solving |