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Out of 10 white, 9 black and 7 red balls, in how many ways
can we select one or more balls
(a) 234
(b) 52
(c) 630
(d) 879
Read Solution (Total 4)
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- out of p alike things,q alikes things and r alike things, no of ways of selecting one or more = (p+1)*(q+1)*(r+1)-1.
so, (11*10*8)-1 =879 - 12 years agoHelpfull: Yes(29) No(2)
- 879........
- 12 years agoHelpfull: Yes(3) No(2)
- @rahul : can you explain how..?
- 12 years agoHelpfull: Yes(3) No(7)
- out of 10 White balls either 0 or 1 ball can be selected.
out of 9 black balls either 0 or 1 ball can be selected.
out of 7 red ball either 0 or 1 ball can be selected.
so (10C0 * 10C1)+ (9C0 * 9C1) + (7C0 * 7C1) =879 - 10 years agoHelpfull: Yes(2) No(1)
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