Eduwhere's Puzzle: Permutation & Combination

Permutation & Combination from the Quantitative Aptitude is an important topic for various competitive exams including banking, management, railways, etc.

 

Here is a set of questions related to Permutation and Combination which will help you to brush up your skills. But before attempting this, ensure that you are aware of all the important formulae in Permutation and Combination section.

 

Prepare for your exams with Eduwhere

 

Click here to read all the important Permutation & Combination formulae

 

Visit Eduwhere to prepare for your upcoming examination

 

Mention the correct answer in the Comments section.

 

For more such informative updates and general knowledge articles, follow Eduwhere Community.

Eduwhere provides online mock tests for examinations like CAT, MAT, XAT, SNAP, CMAT, CLAT, SBI PO, SBI Clerk, SSC CGL, SSC CHSL, CTET, IBPS PO, IBPS Clerk, AFCAT and others.

With the Eduwhere Edge pass available for 99/- for 1 month and 199/- for 3 months, you can get complete access to all the mock tests available with us.

 

Prepare with Eduwhere Edge

 


For 1st question:

Solution: for ordered triplets, we need to add 2 sums b/w 3 natural numbers. eg. there are 10 1's, we need to add 2 plus b/w them.

1_1_1_1_1_1_1_1_1_1

1 + 1_1_1_1_1 + 1_1_1_1 = 1+5+4=10

So there are 9 places and two add for 3 numbers additionally we need ordered triplets so 1,5,4 and 4,5,1 are different.

i.e 9C2 =36


2nd Question answer is 60 ????



3

Posts

964

Views