a bag containing seven white was 3 red balls 2 black balls A ball is picked from the bag random find the probability of first picking a red ball picking a white ball picking either a white ball or black ball
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Answer:
Since, total no. of balls = 7+5+3 = 15
(i) No. of balls that are red or white = 7+5 = 12
∴ Required probability =
15
12
=
5
4
(ii) No. of balls that are not black = 7+5 = 12
∴ Required probability =
15
12
=
5
4
(iii) No. of balls that are neither white nor black = 7
∴ Required probability =
15
7
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