engineering recuitment OSSC Combined Technical Services (ଓଡିଶା) Mock Test 2023-24 Mathematics Permutations and Combinations Word Problems
How many 4-letter words can be formed out of the letters of 'EGOIST' having at least one vowel? (repetition is not allowed)
1
12 × 4!
2
15 × 4!
3
21 × 4!
4
24 × 4!