A man has 6 frens ; in hw many ways may he invite one or more of them to dinner???????

• ans :61
  
  =6c1+6c2+6c3+6c4+6c5+6c6
  =6+15+20+15++6+1
  =63ways
• 11 years agoHelpfull: Yes(34) No(1)
• inviting first person-2 ways
  inviting second person-2 ways
  ...
  inviting sixth person-2 ways
  finally no of ways of inviting 6 persons is-2*2*2*2*2*2
  no of ways of inviting atleast one
  person is- total-inviting none
  =2^6-1
  
• 11 years agoHelpfull: Yes(9) No(0)
• he can invite 1 person in 6c1 ways
  2 in 6c2
  3 in 6c3
  4 in 6c4
  5 in 6c5 and
  6 in 6c6
  total ways =6+15+20+15+6+1=63
• 11 years agoHelpfull: Yes(5) No(1)
• 5c1+5c2+5c3+5c4+5c5=31 ways
• 11 years agoHelpfull: Yes(0) No(4)
• ans
  3*5*4*3=180 ways
• 11 years agoHelpfull: Yes(0) No(6)
• It think its 6C1+6C2+6C3+6C4+6C5+6C6=66 ways!
• 11 years agoHelpfull: Yes(0) No(6)
• answerr is pow(2,6)=64
  64-1=63
• 11 years agoHelpfull: Yes(0) No(0)