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Q
A bag contains 5 red balls and 8 blue balls. It also contains 4 green and 7 black balls. If a ball is drawn at random,...
A bag contains 5 red balls and 8 blue balls. It also contains 4 green and 7 black balls. If a ball is drawn at random, then find the probability that it is not green.
A
02-May
B
07-Apr
C
01-Apr
D
01-Jun
E
05-Jun
A
02-May
B
07-Apr
C
01-Apr
D
01-Jun
E
05-Jun
Solution
Total number of balls = 5 + 8 + 4 + 7 = 24Number of ways of selecting a ball from the bag is= 24C1 = 24Number of...
Total number of balls = 5 + 8 + 4 + 7 = 24
Number of ways of selecting a ball from the bag is
= 24C1 = 24
Number of balls other than green = 5 + 8 + 7 = 20
Number of ways of selecting a ball other than green from the bag is
= 20C1 = 20
Probability = 20/24 =5/6
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