80 bulbs are selected at random from a lot and their time (in hours) is recorded in the form of a frequency table given below

One bulb is selected at random from the lot. The probability that its life is 1150 h, is

80 bulbs are selected at random from a lot and their life time (in hours) is recorded in the form of a frequency table given below. Find the probability that bulbs selected randomly from the lot has life less than 900 hours.

80 batteries are selected at random from a lot and their lifetime is recorded in the form of a frequency table given below: A battery is chosen at random from the lot. What is the probability that it has lifetime which is perfect square of a natural number?

80 bulbs are selected at random from a lot and their lifetime in hours is recorded as under : One bulb is selected at random from the lot . What is the probability that its life is 1150 hours ?

80 bulbs are selected at random from a lot and their lifetime in hours is recorded as under One bulb is selected at random from the lot . What is the probability that the selected bulb has a life more than 500 hours ?

The probability that bulbs selected randomly from the lot has life less than 900 h, is

The probability that bulbs selected randomly from the lot has life less than 900 h, is

A lot of 25 bulbs contain 5 defective ones. One bulb is drawn at random from the lot. What is the probability that the bulb is good.

A lot of 25 bulbs contain 5 defective ones. One bulb is drawn at random from the lot. What is the probability that the bulb is good.

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

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