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

A lot consists of 144 ball pens of which 20 are defective and the others are good. The shopkeeper draws one pen at random and gives it to Sudha. What is the probability tha She will not buy it ?

A lot consists of 144 ball pens of which 20 are defective and the others are good. The shopkeeper drawn one pen at random and gives it to Sudha. What is the probability that She will buy it?

A lot consists of 200 ball pens of which 50 are defective and others are good. The shop keeper draws one pen at random any gives to sindhu. What is the probability that She will not buy it ?

A lot consists of 200 ball pens of which 50 are defective and others are good. The shop keeper draws one pen at random any gives to sindhu. What is the probability that She will buy it ?

A shopkeeper has 100 memory cards in a box. Among then, 15 memory cards are defective. When a person came to the shop to buy a memory card, the shopkeeper drew a memory card at random from the box. Then, what is the probability that this memory card is defective?

A shopkeeper has 100 memory cards in a box. Among them 15 memory cards Are defective when a person came to the shop to buy a memory cards, the shopkeeper draw a memory card at random from the box then (i) What is the probability that memory card is defective? (ii) After drawing the first memory card which is defective, it is not placed back in the box”. Then what is the probability that this memory card is not defective.

A bag contains 10 identical balls, of which 4 are blue and 6 are red. Three balls are taken out at random from the bag one after the other. Find the probability that all the three balls drawn are red without replacement.