PDF International Contest-Game MATH KANGAROO

15. In one kangaroo family, there is a custom to name their babies by names, which consist of two letters of the word KANGAROO: the first letter is a consonant, the second letter is a vowel. How many different baby names can be composed? (A) 8 (B) 5 (C) 10 (D) 6 (E) 12 16. ................
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