a bag conains white,red and black balls only. A ball is drawn at random from the bag . If the probability of getting a white ball is 3/10 and that of a black ball is 2/5 , then find the probability of getting a red ball . If the bag contains 20 black balls , then find the total no. of balls in the bag
Answers
Answered by
0
There are 50 balls in bag
20 black and 30 white balls...
Answered by
0
Probability of getting a white ball = 3/10
Probability of getting a black ball = 2/5 =4/10
Probability of getting a red ball = 1-3/10-4/10
=3/10
Bag contains 20 black balls.
Let the total no. of ball be x.
By the problem,
20/x=2/5 or 1/x=1/50 or x=50
Hence, the probability of getting a red ball is 3/10 and the total number of balls in the bag is 50.
Probability of getting a black ball = 2/5 =4/10
Probability of getting a red ball = 1-3/10-4/10
=3/10
Bag contains 20 black balls.
Let the total no. of ball be x.
By the problem,
20/x=2/5 or 1/x=1/50 or x=50
Hence, the probability of getting a red ball is 3/10 and the total number of balls in the bag is 50.
Similar questions