Question

11. A Bag contains 3 red,8 black and 4 white balls, A ball is drawn at random, What's
probability that ball drawn is not black
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Answer 1

PP ( E ) = No. of favourable outcome / No. of possible out come .

possible outcome =3red ,8black and 4white balls .

=number of possible out come =15

Favourable outcome ( not black) =3red and 4 white balls .

number of favourable outcome=7

=P (not black ) =7/15 Answer...

Answer 2

Answer :

• PP ( E ) = No. of favourable outcome / No. of possible out come .
• possible outcome =3red ,8black and 4white balls .
• =number of possible out come =15
• Favourable outcome ( not black) =3red and 4 white balls .
• number of favourable outcome=7

=P (not black ) =7/15 Answer...