Which of the following statements are correct? (A) Number of words that can be formed with 6 onl...

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Which of the following statements are correct?
(A) Number of words that can be formed with 6 only of the letters of the word CENTRIFUGAL if each word must contain all the vowels is \( 3 \cdot 7 \) !
(B) There are 15 balls of which some are white and the rest black. If the number of ways in which the balls can be arranged in a row, is maximum then the number of white balls must be equal to 7 or 8 . Assume balls of the same colour to be alike.
(C) There are 12 things, 4 alike of one kind, 5 alike and of another kind and the rest are all different. The total number of combinations is 240 .
(D) Number of selections that can be made of 6 letters from the word COMMITTEE is 35 .
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