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

Total Price: R

There are no items in this cart.
Continue Shopping
Get instant 20% OFF on Online Material.
coupon code: MOB20 | View Course list

Get extra R 550 off


dear sir/madam, i am having doubt in the following question for some time now and iit is on 11th ,so please help...!

"In how many ways 10 speakers can speak at a function such that A speaks before B and B speaks before C."

the answer is 10!/3!

i cannot understand how.Please help.

6 years ago


Answers : (2)


Follow these steps:

1.  Select A,B,C from 10 people in 10C3 ways.

2.   Arrange A,B,C in only 1 way. AS Ais before B and Bis before C.

3.   All others remaining can be permuted in 7! ways.


So, total : 10C3 *1*7!.

Solve this to get ur answer.


6 years ago

thanks for the answer

5 years ago

Post Your Answer

Other Related Questions on Algebra

how do we understand when to apply permutation formula and when to apply conbination formula?
Try changing the order and see if it affects the count. If it affects it permutation and otherwise its combination. For example if consolation prize is being distributed then if i am giving ...
Harsh Patodia one month ago
let N=(2+1) (2 2 +1) (2 3 +1) …....(2 32 +1) +1 then log 256 N =?
jagdish singh singh one month ago
what is cryptograrhy?????????????????????????????????
Cryptography is the science of providing security for information. It has been used as a means of providing secure communication between individuals, government agencies and military...
dolly bhatia 3 months ago
@ sivagiri Cryptography refers to the method of storing and transmitting data in a perticular form , so, that only those for whoom it is intended can read and process it . u can simply tell ...
Umakant biswal 3 months ago
∫sin 2x.cos2x dx
Dear Student, Hint: Multiply and divide by 2, Use 2sinAcosA = sin (2A) and then integrate it. Thanks.
Vijay Mukati one year ago
Dear Student, Use the hint as I provided. That will be easier compared to yours. Thanks.
Vijay Mukati one year ago
thanks vijay sir.. but if i substitute sin2x =t and then integrate i got different answer
sumit one year ago
Find domain and range and describe nature of graph sir
It will be great if u can specifically pick example so that i can explain in better way. In general u draw vertical linealonggraph, itwill represent range where horizontal line paralle to x...
Harsh Patodia one month ago
A square has two of its side on a circle and other two on a tangent to the circle. Find area of square if radius of circle is 5cm.
Two of its SIDE on circle ?????? Pls correct the question Thanks
Nishant Vora 2 months ago
View all Questions »

  • Complete JEE Main/Advanced Course and Test Series
  • OFFERED PRICE: R 15,000
  • View Details
Get extra R 3,750 off

Get extra R 550 off

More Questions On Algebra

Ask Experts

Have any Question? Ask Experts

Post Question

Answer ‘n’ Earn
Attractive Gift
To Win!!!
Click Here for details