what is random error ?

If the maximum error in the measurement of the radius of a sphere is 2% then what is maximum error in the calculation of volume?

What is the % error in measurement of T of a pendulum if maximum errors in measurements of length and ‘g’ are 2% and 4% respectively ?

One card is drawn at random from a deck of 52 playing cards. What is the probability that the card drawn is (a) a spade

One card is drawn at random from a deck of 52 playing cards. What is the probability that the card drawn is (b) an ace

How drift velocity related with random velocity?

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

A bag contains 3 red balls and 5 black balls. A ball is drawn at random from the bag. What is the probability that the ball drawn is (i) réd?

A bag contains 3 red balls and 5 black balls. A ball is drawn at random from the bag. What is the probability that the ball drawn is(ii) not red?

A lot of 20 bulbs contain 4 defective ones. One bulbs is drawn at random from the lot.Suppose the bulb drawn in (i) is not defective and is not replaced. Now one bulb is drawn at random from the rest. What is the probability that this bulb is not defective?

A bag contains 5 white balls, 7 red balls, 4 black balls and 2 blue balls. One ball is drawn at random from the bag. What is the probability that the ball drawn is: white or blue.