A single letter is selected at random from the word probability. The probability that it is a vowel 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?

A letter is chosen at random from the 'ASSASSINATION'. Find the probability that letter is (i) a vowel (ii) a consonant.

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

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 ?

There are two coins, one unbiased with probability 1/2 of getting heads and the other one is biased with probability 3/4 of gatting heads. A coin is selected at random and tossed.It shows heads up. Then the probability that the unbiased coin was selected is-

If two numbers are selected at random from the numbers 1,2,3,4 determine the probability that their sum is odd when they are selected together.

An integer is chosen at random from the first 100 positive integers what is the probability that the integer is divisible by 6 or 8?

Three numbers are chosen at random from the first 20 natural numbers. The probability that their product is even is -

A number is chosen at random from the first 50 positive integers. Find the probability that the chosen number is divisible by 4 or 5.

The letter of word SOCIETY are placed at random in a row what is the probability that three vowels comes together?