A lot consists of 144 ball pens of which 20 are defective and the others are good. Nuri will buy a pen if it is good, but will not buy if it is defective. The shopkeeper draws one pen at random and gives it to her. What is the probability that:
(i) she will buy it?
(ii) she will not buy it?

A lot consists of 144 ball pens of which 20 are defective and the others are good. Nuri will buy a pen if it is good, but will not buy if it is defective . The shopkeeper drawn one pen at random and gives it to her. What is the probability that She will buy it?

A lot consists of 144 ball pens of which 20 are defective and the others are good. Nuri will buy a pen if it is good, but will not buy if it is defective . The shopkeeper drawn one pen at random and gives it to her. What is the probability that She will not buy it ?

A box contains 144 pens of which 20 are defective and the others are good. A person will buy a pen if it is good and will not buy if it is defective. The shopkeeper draws one pen from the box at random and gives it to the person. What is the probability that the person (a) will buy it? (b) will not buy it?

Gopi buys a fish from a shop for his aquarium. The shopkeeper takes out one fish at random from a tank containing 5 male fish and 8 female fish . What is the probability that the fish taken out is a male fish ?

12 defective pens are accidentally mixed with 132 good ones. It is not possible to just look at a pen and tell whether or not it is defective. One pen is taken out at random from this lot. Determine the probability that the pen taken out is a good one.

(i) A lot of20 bulbs sontains 4 defective ones. One bulb is drawn at random from the lot. What is the probability that this bulb is defective? (ii) Suppose the bulb drawn in (i) is not defective and is not replaced. Now one bulb is drawn at random from the rest. What is the probability that this bulb is not defective?

Read the following passage and answer the questions given at the end. A game booth at Diwali fair involves using a spinnerr first. Then if the spinner stops on an even number the player is allowed to pick a marble from a box. The spinner and the marbles in the box are represented in figure. prizes are given, when black marble is picked. shweta plays the game once. i] What is the probability that she will be allowed to pick a marble from the box? ii} Suppose she is allowed to pick a marble from the box, what is the probability of getting a prize, when it is given that the box contains 20 balls out of which 6 are Black?

In a bundle of 50 shirts, 44 are good, 4 have minor defects, and 2 have major defects. What is the probability that (a) a trader buys only good shirts? (b) a trader rejects only a shirt with major defects?

Kristin received a CD player for birthday. She bought 3 CDs and received 5 others as gifts. What fraction of her total CDs did she buy and what fraction did she receive as gifts?