In a pack of 10 watches, 3 are known ot be defective. If 2 watches are selected at random from the pack, what is the probability that at least one is defective ?

In a batch of 10 light bulbs , 2 are defective . If 3 of the bulbs are chosen at random, what is the probability that at least 1 of the chosen bulbs is defective ?

Out of 15 articles in a box, three of. them are defective. If 5 articles of them are drawn at random, what is the probability that at least one article are defective.

A packet of 10 electronic components is known to include 2 defectives.If a sample of 4 components is selected at random from the packet,what is the probability that the sample does not contain more than 1defective?

A lot of 100 watches is known to have 10 defective watches. If 8 watches are selected (one by one with replacement) at random, what is the probability that there will be at least one defective watch?

A lot of 100 watches is known to have 10 defective watches. If 8 watches are selected (one by one with replacement) at random, then what is the probability that there will be atleast one defective watch ?

A lot of 100 watches is known to have 10 defective watches. If 8 watches are selected (one by one with replacement) at random, then what is the probability that there will be atleast one defective watch ?

A lot of 100 watches is known to have 10 defective watches. If 8 watches are selected (one by one with replacement) at random, then what is the probability that there will be atleast one defective watch ?

Minor defects are found on 7 to 10 new cars. If 3 of the 10 cars are selectred at random , what is the probability that 2 have minor defects ?

A lot of 40 bulbs contain 10 defective one. One bulb is selected at random from the lot what is the probability that. This bulb is defective? Suppose the bulb selected in previous case in not defective and is not replaced. Now one bulb is selected at random. from the test what is the probability that this bulb is not defective.

A lot of 20 bulbs contains 4 defective ones. One bulb is drawn at random from the lot. What is the probability that the bulb is defective?