sign up I login
 advanced
refer a friend - earn nickels!!

Ask & Discuss Questions with Community & Experts

Moderation Team
Ask iit jee aieee pet cbse icse state board community Discussion Response Post to: permutation
Forum Index -> Algebra -> View Full Question like the article? email it to a friend.  
Author Message
chimanshu_007 (11412)

Forum Expert Blazing goIITian

Olaaa!! Perrrfect answer. 2092  [2568 rates]

chimanshu_007's Avatar

total posts: 3796    
offline Offline
for second qs...

i think u can arrange gals first...

- G - G - G - G -

u can arrange gals in 4! ways (4 gals , 4 positions)

now 5 places are left....

arrange boys in that....

5P3 ways...

so ans is 4! * 5P3

or u can arrange boys first

- b - b - b -

3! ways of arranging boys.....

4 places and 4 gals...so u can arrange them in 4! ways

ans - 4! * 3!



I always like to walk in rain as no one can see me crying there :(
frnds are like diamonds , if u hit them , they don't break but they slip frm ur hands
-----It is better to be hated for what you are than to be loved for what you are not.----
*****wen love and skill work together--expect a masterpiece*****






 this reply: 7 points  (with Olaaa!! Perrrfect answer.   in 2 votes )   [?]
 
You have to be logged on to rate
  
 

Top Offers for goIITians
Correspondence Courses
Brilliant Tutorials
Narayana Institute
Aakash Institute
Classroom/Crash Courses
Narayana - Kota , Delhi , Others
Brilliant Tutorials - Class , Crash
Aakash Institute - Medical , Engg
Online Test Series
Brilliant Tutorials
Narayana Institute
Aakash Institute
Mahesh Tutorials
AMITY      Sri Chaitanya