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- Subject
- Permutations and Combinationsmathematics-mcqs › permutations-and-combinations
- Published
- 24 Jul 2019
- Last updated
- 28 May 2026
Explanation
One boy can be chosen from 20 boys in 20 different ways. Similarly, one girl can be selected from 25 girls in 25 ways. Therefore, the total number of ways to select one boy and one girl is 20 multiplied by 25, which equals 500.
More Permutations and Combinations MCQs
Practice related questions from the same subject.
- 1.Three flags, each of a distinct color, are used in a military drill to create different signaling codes by waving: I. A single flag of any color II. Any two flags in a specific order III. All three flags in various sequences What is the maximum number of unique codes that can be formed?
- 2.A question paper contains five problems, each with three internal options. In how many different ways can a candidate attempt at least one problem by choosing one option per problem?
- 3.How many different ways can you choose three consonants and two vowels from the letters in the word "TRIANGLE"?
- 4.A container holds 9 yellow balls, 3 white balls, and 4 red balls. How many different ways can you select two balls from this collection?
- 5.Using the digits {1, 2, 3, 5, 7, 9}, how many distinct four-digit even numbers can be created?
- 6.Using the digits {1, 3, 4, 5, 7, 9} without repeating any digit, how many unique four-digit numbers can be created?
- 7.In how many different ways can six boys and six girls be arranged in a single row for a photograph such that no two girls are seated next to each other?
- 8.A lock features three rotating rings, each displaying six unique letters. What is the maximum number of failed attempts possible before the lock opens?
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