Question

In how many different ways can the letters of the word OPTICAL be arranged so that the vowels always come together.
A) 560
B) 920
C) 780
D) 720
E) None of these

Answer 1

OIA can be arranged in 3x2x1=6 ways

P,T,C,L,and vowels (OIA) in 5x4x3x2x1=120 ways

totally 6 x120 =720 ways

D)720 is correct