PPSCFPSCNTSPakistan govt jobs
- Subject
- Permutations and Combinationsmathematics-mcqs › permutations-and-combinations
- Published
- 24 Jul 2019
- Last updated
- 28 May 2026
Explanation
The total number of unique handshakes among 30 people is calculated using the combination formula C(30, 2) = 30 × 29 / 2 = 435. Options involving factorials or incorrect sums do not represent the correct count of handshakes.
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.There are 20 male students and 25 female students in a class. How many different pairs consisting of one boy and one girl can be formed?
- 4.How many different ways can you choose three consonants and two vowels from the letters in the word "TRIANGLE"?
- 5.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?
- 6.Using the digits {1, 2, 3, 5, 7, 9}, how many distinct four-digit even numbers can be created?
- 7.Using the digits {1, 3, 4, 5, 7, 9} without repeating any digit, how many unique four-digit numbers can be created?
- 8.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?
More in Mathematics Mcqs
- Areas
- Arithmetic Mcqs
- Average Mcqs
- Basic Maths Mcqs
- Boats and Streams
- Compound Interest
- Discount Mcqs
- Height and Distance Mcqs
- Math Solutions
- Men Food Mcqs
- Mensuration
- Mixtures and Allegations
- Odd Man Out Series Mcqs
- Partnership
- Percentage Mcqs
- Pipes and Cisterns
- Probability
- Problems on L.C.M and H.C.F
- Problems on Numbers
- Profit and Loss Mcqs
- Quadratic Equations
- Races and Games
- Ratio and Proportion
- Simple Equations
- Simplification and Approximation
- Stocks and Shares Mcqs
- Time & Distance Mcqs
- Time and Work Mcqs
- Volume and Surface Area Mcqs
- Volumes
- interest Mcqs