If all the numbers 2, 3, 4, 5, 6, 7, 8 are arranged, find the number of arrangements in which 2, 3, 4, are together?
Choose the correct option.
A) 650
B) 680
C) 720
D) 740
E) 750
If (2 3 4) is one.   we must arrange (2 3 4), 5, 6, 7, 8 in   5P5 = 5! = 120 ways   2, 3, 4 can be arranged in 3P3 = 3! = 6   120 × 6 = 720.   720
<result>C</result>
If all the numbers 2, 3, 4, 5, 6, 7, 8 are arranged, find the number of arrangements in which 2, 3, 4, are together?