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Answered

A container has six red balls, four white balls and seven green balls. How many ways can you draw 4 balls if at most 3 are red?

Sagot :

YTROXSGAMINGIN

Since there are 2 white, 3black ,4 red balls

No of ways in which balls can be drawn

1.1 white 1 black 1 red

2. 2 white 1 black

3. 2 red 1 black

4. 2Black 1 red

5. 2 Black 1 white

6. 3 black

The number of ways in which ball can be drawn

= 2C1Ă—3C1Ă—4C1+2C2Ă—3C1+4C2Ă—3C1 +3C2Ă—4C1+3C2Ă—2C1+3C3

=2Ă—3Ă—4+1Ă—3+6Ă—3+3Ă—4+3Ă—2+1

=24+3+18+12+6+1

=64

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