## A bag contains 3 black, 4 white and 2 red balls, all the balls being different. The number of selection of at most 4 balls containing balls

Question

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## Answers ( )

Step-by-step explanation:Required number of selection

=

3

C

1

×

4

C

1

×

2

C

1

(

6

C

3

+

6

C

2

+

6

C

1

+

6

C

0

)

=3×4×2(20+15+6+1)

=42(4!)

Answer:Step-by-step explanation:Since each selection should have all the three colours, minimum 3 balls one each colour should be selected in3

C

1

×

4

C

1

×

2

C

1

waysMaximum 6 balls are to be selectedMaximum 6 balls are to be selected =24(1+6+15+20)

=42×4!