Number of ways = 7!/3!2! = 7X6X5X4X3X2X1/3X2X1X2X1 = 420
In how many different ways can the letters of the word 'DIVIDED' be arranged?
Options:
(A) 250
(B) 280
(C) 300
(D) 420
(E) 360
(D)

The new letter sequence is E C N A B R U T S I D
Clearly, S comes after T
If in the word 'DISTURBANCE', the first letter is interchanged with the last letter, the second letter is interchanged with the tenth letter and so on, which letter would come after the letter T in the newly formed word ?
Options:
(A) S
(B) C
(C) T
(D) R
(E) U
(A)

720 * 5/18 = 200 mps
Express a speed of 720 kmph in meters per second?
Options:
(A) 120 mps
(B) 200 mps
(C) 181 mps
(D) 190 mps
(E) 125 mps
(B)