99 Percentile Qs Bank for JEE MainMathematicsPermutation and Combination
The English alphabets have 5 vowels and 21 consonants. How many words with two different vowels and two different consonants can be formed from the alphabet?
Options
- A2100 2 !
- B210 2 !
- C210 4 !
- D2100 4 !
Correct answer
D. 2100 4 !
Step-by-step solution
Selection of two vowels ^5 C ₂ Selection of two consonants ²¹ C₂ Arrangements of four letters 4 ! Total words = ^5 C₂ ²¹ C₂ 4 !=2100 4 !