A string of lights contains 10 bulbs. If one bulb fails, The probability that a single bulb works for at least 700 hours is 0.95. If the bulbs works independently. What is the pobability that the string of 10 bulbs will work for at least 700 hours.

The probability that a bulb produced by a factory will fuse after 150 days of use is 0.05. The probability that out of 5 such bulbs at least one will fuse after 150 days of use is

The probability that a bulb produced by a factory will fuse after 150 days of use is 0.05. The probability that out of 5 such bulbs more than one will fuse after 150 days of use is

The probability that a bulb produced by a factory will fuse after 150 days of use is 0.05. The probability that out of 5 such bulbs not more than one will fuse after 150 days of use is

If the probability that a randomly selected bulb produced by a factory will fuse after 200 days of use is 0.15, then in a random selection of 8 bulbs, the probability of getting not more than one bulb that will fuse after 200 days of use is -

Choose the correct answer: In a box containing 100 bulbs, 10 are defective. The probability that out of a sample of 5 bulbs, none is defective is

A lot of 20 bulbs contain 4 defective ones. 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 is not defective and is not replaced. Now one bulb is selected at random from the rest. What is the probability that this bulb is not defective?

The probability that a bulb produced by a factory will fuse after 150 days if used is 0.05. what is the probability that out of 5 such bulbs none will fuse after 150 days of use? 1-(19/20)^5 b. (19/20)^5 c. (3/4)^5 d. 90(1/4)^5

The probability that a bulb produced by a factory will fuse after 150 days is 0.05. Find the probability that out of 5 such bulbs (i) none  (ii) not more than one (iii) more than one (iv) at least one will fuse after 150 days of use.

The stop cock containing two bulbs of volume 5 litre and 10 litre containing an ideal gas-at 9 atm and 6 atm respectively is opened. What is the final pressure in atm if the temperature remains the same ?

In a house 8 nos of 60 watt bulb runs for 10 hrs and a 1.5 kw electric iron runs for 15 mins. What is the amount of electric consumed. Cost of 1 unit electric is Rs. 6.