in how many ways 4 books were selected out of 10 ,so that two particular books always excluded

• 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
• 6 years agoHelpfull: Yes(0) No(2)
• 2 except means 10-2=8
  8c4=(8*7*6*5)/(4*3*2*1)
  ans=70
• 6 years agoHelpfull: Yes(0) No(0)