In how many different ways can the letters of the word 'DETAIL' be arranged such that the consonants must occupy only the odd positions?  Select the correct option:  A) None of these  B) 64  C) 120  D) 36  E) 360
OEOEOE   3 consonants DTL can be arranged on odd places in 3!=6 ways. Similarly 3 vowels can be arranged on even places in 3!=6 ways.   Total = 6*6= 
<gadget id="calculator">6*6</gadget>
<output>36</output>
36.   Answer: 36.
<result>D</result>
In how many different ways can the letters of the word 'DETAIL' be arranged such that the consonants must occupy only the odd positions?