Capgemini
Company
Numerical Ability
Permutation and Combination
in how many ways 4 books were selected out of 10 ,so that two particular books always excluded
Read Solution (Total 7)
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- 2 books are excluded that means thoose will be offcount. So total book is 10-2=8 out of which 4 can be selected. Hence no. Of ways is 8C4
=70 - 8 years agoHelpfull: Yes(13) No(0)
- 8C4 = 70
Total 10 books, out of 10 ------- 2 books always excluded, so, the no.of combinations will come for 8 books only. Hence n = 8, To be selected r = 4,
No. Of Combinatons = 8C4 ===> n! / ( (r!)* (n-r)!)
=== 8! / (4! * 4!)
==== 70 - 8 years agoHelpfull: Yes(5) No(0)
- 4 books selected out of 10 =10c4=210
2 books are excluded means 210-2=208 - 8 years agoHelpfull: Yes(2) No(20)
- Correct answer is 8c4.
- 7 years agoHelpfull: Yes(1) No(0)
- om sekhar can u plz share the remaining questions wt are u remember??
- 8 years agoHelpfull: Yes(0) No(1)
- as 2 are always excluded
8c4 = 70 ways - 7 years agoHelpfull: Yes(0) No(2)
- 2 except means 10-2=8
8c4=(8*7*6*5)/(4*3*2*1)
ans=70 - 7 years agoHelpfull: Yes(0) No(0)
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