$If these are 40 guests in a party. If each guest takes a shake hand with all the remaining guests. Then the total number of hands shake is _________.$
Options
A780
B840
C1,560
D1,600
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Permutations and CombinationsPYQ Jun 19Question 1685 of 159
All Questions Correct Answer
✅ Option a — 780
All Options:
- A780
- B840
- C1,560
- D1,600
About This Chapter: Permutations and Combinations
Paper
Paper 3: Quantitative Aptitude
Weightage
4-6 Marks
Key Topics
Factorials, Permutations, Combinations
This chapter deals with the fundamental principles of counting. It covers factorials, circular permutations, restricted permutations, combinations, and the differences between selecting items versus arranging them.
View Official ICAI SyllabusExam Strategy Tip
The most common mistake is confusing 'P' (Arrangement) with 'C' (Selection). If order matters (like opening a lock), use P. If order doesn't matter (like choosing a team), use C.
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