Out of 10 green,9 black,7 red balls,how many ways we can select one or more balls?

• total ways =26c1+26c2+26c3+.............26c26=2^26-1
  
  note:nc0+nc1+............+ncn=2^n
• 12 years agoHelpfull: Yes(28) No(1)
• malarvannan they ask the question from combination not from possibility
• 12 years agoHelpfull: Yes(4) No(3)
• the green ball can be selected in 11 manner(10+ not select at all)
  same way black= 10 ways
  red=8 ways
  total= 11*10*8 - 1(minus 0 0 0 combination)
  =880-1=879
• 12 years agoHelpfull: Yes(3) No(0)
• minimum possibility for choosing one ball is
  1/(10+9+7) from all 26 balls
  choosing one ball from each color is
  (1/10)+(1/9)+(1/7)
• 12 years agoHelpfull: Yes(0) No(7)