MY CART (5)

Use Coupon: CART20 and get 20% off on all online Study Material

ITEM

DETAILS

MRP

DISCOUNT

FINAL PRICE

Total Price: R

There are no items in this cart.

Continue Shopping

Continue Shopping

Menu

` sir ,What is the main difference between permutation & combination?`

6 years ago

Dear hitesh,

Permutation

Suppose we want to find the number of ways to arrange the three letters in the word CAT in different two-letter groups where CA is different from AC and there are no repeated letters.

Because order matters, we're finding the number of permutations of size 2 that can be taken from a set of size 3. This is often written 3_P_2. We can list them as:

CA CT AC AT TC TA

Combination

When we want to find the number of combinations of size 2 without repeated letters that can be made from the three letters in the word CAT, order doesn't matter; AT is the same as TA. We can write out the three combinations of size two that can be taken from this set of size three:

CA CT AT

Please feel free to ask your queries here. We are all IITians and here to help you in your IIT JEE preparation.

All the best.

Win exciting gifts by answering the questions on Discussion Forum. So help discuss any query on askiitians forum and become an Elite Expert League askiitian.

Now you score 5+15 POINTS by uploading your Pic and Downloading the Askiitians Toolbar respectively : Click here to download the toolbar..

Askiitians Expert

Sagar Singh

B.Tech, IIT Delhi

6 years ago

Combinationmeans selecting a particular number of things from a larger group of things. In this, the order of selection does not matter.That is, if i select,

r,g,t,y,d

is equivalent to

t,y,r,d,g

as the order of selection does not matter.

Permutationmeans selecting a particula number of things from a larger groups of things and then re-arranging them. In this, the order of selection matters.That is,

r,g,t,y,d

is

notequivalent tot,y,r,d,g

as re-arranging the alphabets a new permutation is formed.

So, the basic difference is that in combination there is not arrangement, while in permutation there is arrangement.

Please Approve!!

6 years ago

Permutation

Suppose we want to find the number of ways to arrange the three letters in the word CAT in different two-letter groups where CA is different from AC and there are no repeated letters.

Because order matters, we're finding the number of permutations of size 2 that can be taken from a set of size 3. This is often written 3_P_2. We can list them as:

CA CT AC AT TC TA

Combination

When we want to find the number of combinations of size 2 without repeated letters that can be made from the three letters in the word CAT, order doesn't matter; AT is the same as TA. We can write out the three combinations of size two that can be taken from this set of size three:

CA CT AT

6 years ago

Think You Can Provide A **Better Answer ?**

Answer & Earn Cool Goodies

Have any Question? Ask Experts

Post Question

copyright © 2006-2017 askIITians.com

info@askiitians.com