Question
How many four-letter words without repetition having
exactly two vowels can be formed by using the letters of the word "TRIANGLE"?Solution
"TRIANGLE" has 5 consonants and 3 vowels.
Number of ways to select the letters = 3C2 × 5C2 = 3 × 10 = 30
Arrangements of 4 letters = 4! = 24
Total number of words formed = 30 × 24 = 720
More Permutation and combination Questions
The NISAR satellite, set to be launched in March 2025, is a collaborative project between which two countries?
Hydrogen was discovered by:
Which extinct species was revived using ancient DNA sequencing and gene editing by Colossal Biosciences?
Sir CV Raman was awarded Nobel Prize for his work connected with which of the following phenomenon of radiation?
What is the range capability of India’s first long-range hypersonic missile?
Which of the following contributes to acid rain?
Which gas is responsible for the depletion of the ozone layer?
