A bag contains 15 balls of three different colour green,black,and yellow A ball is drawn at random from the bag the probability of green ball is 1/3.. the probability of of yellow ball is 1/5 (a) what is the probability of black ball? (b) how many balls are green?
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answer of b is 5
Answer:
(a) probability of black ball =
(b) number of green balls = 5
Step-by-step explanation:
Total number of ball = 15
probability of green ball =
hence, the number of green ball = total number of ball x probability of green ball
= 5
probability of yellow ball =
so, the number of yellow ball = total number of ball x probability of yellow ball
= 3
So, the number of black ball = total number of ball - number of green ball - number of yellow ball
= 15 - 5 - 3
= 7
Hence, the probability of getting black ball =
Hence, the probability black ball is
and total number of green ball is 5.