Q. out of 10 white, 9 black, 7 red balls in how many ways can we select one or more balls

• 2^26 - 1 ways
  
  In total there are 26 marbles
  
  The possibilities of secting 1 or more balls = 26C1 + 26C2 + 26C3 + ... 26C26
  = 2^26 - 1
• 11 years agoHelpfull: Yes(65) No(2)
• simply use this formula for this type of questions (a+1)(b+1)(c+1)-1
  
  here, a=10 b=9 c=7
  
  (10+1)(9+1)(7+1)-1
  
  11*10*8-1
  
  880-1=879.....
• 6 years agoHelpfull: Yes(1) No(0)
• Ways of choosing white balls=11 (0 to 10)
  Ways of choosing black balls=10 (0 to 9)
  Ways of choosing red balls=8 (0 to 7)
  So,
  (11*10*8) - 1 = 879
• 5 years agoHelpfull: Yes(0) No(0)