How many words can be formed from the letters of the word EXTRA if the vowels always come together?
A
12
B
120
C
24
D
48
Correct Option:
D
Explanation
In EXTRA, the vowels E and A must stay together. Treat EA as one block: now we arrange [EA], X, T, R in 4! = 24 ways. E and A can swap internally in 2! ways. Thus 24 × 2 = 48.
