Arithmetic Aptitude Permutations and Combinations Questions - Wikitechy https://www.wikitechy.com/interview-questions/tag/arithmetic-aptitude-permutations-and-combinations-questions/ Interview Questions Mon, 06 Sep 2021 09:29:04 +0000 en-US hourly 1 https://wordpress.org/?v=6.9 https://www.wikitechy.com/interview-questions/wp-content/uploads/2025/10/cropped-wikitechy-icon-32x32.png Arithmetic Aptitude Permutations and Combinations Questions - Wikitechy https://www.wikitechy.com/interview-questions/tag/arithmetic-aptitude-permutations-and-combinations-questions/ 32 32 In a meeting between two countries, each country has 12 delegates. All the delegates of one country shake hands with all delegates of the other country. Find the number of handshakes possible ? https://www.wikitechy.com/interview-questions/permutation-and-combination/in-a-meeting-between-two-countries-each-country-has-12-delegates-all-the-delegates-of-one-country-shake-hands-with-all-delegates-of-the-other-country-find-the-number-of-handshakes-possible/ https://www.wikitechy.com/interview-questions/permutation-and-combination/in-a-meeting-between-two-countries-each-country-has-12-delegates-all-the-delegates-of-one-country-shake-hands-with-all-delegates-of-the-other-country-find-the-number-of-handshakes-possible/#respond Tue, 17 Aug 2021 20:54:03 +0000 https://www.wikitechy.com/interview-questions/?p=1950

In a meeting between two countries, each country has 12 delegates. All the delegates of one country shake hands with all delegates of the other country. Find the number of handshakes possible ?

A . 72

B . 144

C . 288

D . 234

Answer : B . 144

Explanation:

Total number of handshakes = 12 x 12 = 144

]]> https://www.wikitechy.com/interview-questions/permutation-and-combination/in-a-meeting-between-two-countries-each-country-has-12-delegates-all-the-delegates-of-one-country-shake-hands-with-all-delegates-of-the-other-country-find-the-number-of-handshakes-possible/feed/ 0 In how many ways, the letters of the word ‘BANKING’ can be arranged ? https://www.wikitechy.com/interview-questions/permutation-and-combination/in-how-many-ways-the-letters-of-the-word-banking-can-be-arranged/ https://www.wikitechy.com/interview-questions/permutation-and-combination/in-how-many-ways-the-letters-of-the-word-banking-can-be-arranged/#respond Tue, 17 Aug 2021 20:52:23 +0000 https://www.wikitechy.com/interview-questions/?p=1949

In how many ways, the letters of the word ‘BANKING’ can be arranged ?

A. 5040

B. 2540

C. 5080

D. 2520

Answer : D. 2520

Explanation:

Total letters = 7, but N has come twice.
So, the required number of arrangements
= 7! / 2!
= 7 × 6 × 5 × 4 × 3 × 2! / 2!
= 2520

]]> https://www.wikitechy.com/interview-questions/permutation-and-combination/in-how-many-ways-the-letters-of-the-word-banking-can-be-arranged/feed/ 0 In how many different ways, can the letters of the word ‘INHALE’ be arranged ? https://www.wikitechy.com/interview-questions/permutation-and-combination/in-how-many-different-ways-can-the-letters-of-the-word-inhale-be-arranged/ https://www.wikitechy.com/interview-questions/permutation-and-combination/in-how-many-different-ways-can-the-letters-of-the-word-inhale-be-arranged/#respond Tue, 17 Aug 2021 20:50:16 +0000 https://www.wikitechy.com/interview-questions/?p=1948

In how many different ways, can the letters of the word ‘INHALE’ be arranged ?

A. 720

B. 360

C. 120

D. 650

Answer : A. 720

Explanation :

The word ‘INHALE’ has 6 particular letters .
Number of courses of action = n !
= 6 ! = 6 x 5 x 4 x 3 x 2 x 1
= 720

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