The quality control officer at a tire factory reported that 20 tires were defective out of a sample of `10,000` tires . A tire is selected , what are the chances that the tire selected is not defective ?

A box contains 10 sample watches, 2 of which are defective. If 2 are selected at random, the probability that both selected are defective is,

Three machines A, B, C produce respectively 50%, 30%, and 20% of the total no. of items of a factory. The % of defective outputs of these machines is 3%, 4%, 5% respectively. If an item is selected at random, (i) what is the probability that it is 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 10 electronic components is known to include 3 defective parts.If a sample of 4 components is selected at random from the lot, what is the probability that this sample does not contain more than one detectives?

Three factories A, B and C produce the same product. The factory A produces twice as many as B produces while the factories B and C produce in the same quantity. It is known that 2% of the products of A as well as C are defective while 4% of the products of B are defective. All the products of the three factories are stocked together. If a product is selected at random from the stock, what is the probability that the product is defective?

Three factories A,B and C produce the same product. The factory A produces twice as many as B produces while the factories B and C produce in the same quantity. It is known that 2% of the products of A as well as C are defective while 4% of the products of B are defective. All the products of the three factories are stocked together.If a product is selected at random from the stock, what is the probability that the product is defective ?

The bulbs produced in a factory are supposed to contain 5% defective bulbs . What is the probability that a sample of 10 bulbs will contain not more than 2 defective bulbs?

A packet of 10 electronic components is known to include 3 defectives.If 4 components are selected from the packet at random,what is the expected value of the number of defective?

A lot of 100 bulbs from a manufacturing process is known to contain 10 defective and 90 non-defective bulbs . If 8 bulbs are selected at random, what is the probability that . (a) there will be three defective and 5 non defective bulbs. (b) there will be atleast one defecitve bulb.

If a box has 100 pens of which 10 are defective, then what is the probability that out of a sample of 5 pens drawn one by one with replacement atmost one is defective?