A box contains 400 electronic toy'cars.Among them,12 are defective. One toy is taken out at random.What is the probability that It is a defective toy.

A box contains 400 electronic toy'cars.Among them,12 are defective. One toy is taken out at random.What is the probability tha It is a non-defective toy.

Two boxes contain tokens on which numbers 1,2,3,4 are written. One token is taken from each box. a) What is the probability of getting sum of the face numbers a prime number?

A box contains 10 bulbs, of which just three,are defective. If a random sample of five bulbs is drawn, find the probabilities that the sample contains: i) exactly one defective bulb (ii)exactly two defective bulbs (iii) no defective bulbs.

A box contains beads of different colors There are total 200 beads in it One bead is taken at random The probability that it is blue is 0.98 Then, a) How many blue beads are there in the box? b) Some blue beads are removed from the box Now probability of blue bead becomes 0.96 So how many blue beads are removed?

A bag contains 5 red balls, 3 black balls and 4 white balls. A ball is drawn out of the bag at random What is the probability that the ball drawn is white? Hence find the probability that the ball drawn is either red or white. find the probability that the ball drawn is either red or black.

A bag contains 5 red balls, 3 black balls and 4 white balls. A ball is drawn out of the bag at random What is the probability that the ball drawn is white? Hence find the probability that the ball drawn is either red or white

One box contains 8 black balls and 12 white balls. Another box contains 9 black and 6 white balls. One ball is taken from each box at random.What is probability of getting both black? What is the probabilty of getting both white? What is the probability of getting one black and one white?

A box contains 6 red beads and 5 white beads. Another box contains 8 red beads and 4 white beads. If one bead is taken from each box, then:What is the probability that both beads are white?

In a factory which manufacture bulbs,machine X, Y and Z manufactures respectively 25%, 35% and 40% of the bulbs. Of the output 1%, 2% and 3% are respectively defective bulbs. A bulb is drawn at random and found to be defective. What is the probability that it is manufactured by machine Y ?