A box contains 3 blue, 2 white, and 4 red balls. If a ball is drawn at random from the box, what is
the probability that it will be
a white?
blue?
red?
neither blue ball nor red ball
neither blue ball nor white ball
neither white ball nor red ball
not blue?
not red?
not white?
Answers
Answered by
6
Answer:
Step-by-step explanation:
(a) Total no. of marbles=3+2+4=9
(1) No. of white marbles=2
∴ probability of getting a white marble=
9
2
(2) No. of blue marbles=3
∴ probability of getting a blue marble=
9
3
=
3
1
(3) No. of red marbles=4
∴ probability of getting a red marble=
9
4
(b)Since, Total no. of balls = 5+8+7=20
(1) No. of balls that are white or green = 8+7=15
∴ probability of getting a white or green ball =
20
15
=
4
3
(2) No. of balls that are neither green nor red =7
∴ probability of getting a ball that are neither green nor red =
20
7
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