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A speaks the truth 3 out of 4 times, and B5 out of 6 times : what is the probability that they will contradict each other in stating the same fact?
Three groups of children contain respectively 3 girls & 1 boy; 2 girls & 2 boys; 1 girl & 3 boys. One child is selected at random from each group.The chance that the three selected children consists of one girl and 2 boys is
From a pack of 52 cards, two are drawn at random. Find the chance that one is a knave and the other a queen.
Three coins are tossed. What is the probability of getting (i) neither 3 Heads nor 3 Tails?
Ram is visiting a friend. Ram knows that his friend has 2 children and 1 of them is a boy. Assuming that a child is equally likely to be a boy or a girl, then the probability that the other child is a girl, is
What is the probability of obtaining at least one tail when a coin is tossed five times?
Two fair dice are thrown. Find the probability of getting
(i) sum of numbers divisible by 2 or 4.
Three cards numbered 2, 4 and 8 are put into a box. If a card is drawn at random, what is the probability that the card drawn is
(i) a prime number?
Two dice are thrown together. Then, the probability that the sum of numbers appearing on them is a prime number, is8.
If atleast one child in a family with 3 children is a boy then the probability that 2 of the children are boys, is
In rolling two dices, find the probability (i) there is at least one ‘6’
Amit throws three dice in a special game of Ludo. If it is known that he needs 15 or higher in this throw to win then find the chance of his winning the game.
In a horse race there were 18 horses numbered 118. The probability that horse 1 would win is 1/6, that 2 would win is 1/10 and that 3 would win is 1/8.
Assuming that a tie is impossible, find the chance that one of the three will win.
Two fair dice are thrown. What is the probability of (i) throwing a double?
How many words, no matter if they are meaningless, can be formed by the letters of the word 'DIARY'?
197 videos151 docs200 tests

197 videos151 docs200 tests
