What is the probability of a disc thrown on a chess-board, coming to rest on
i] a white square?
ii a black square on the border ?

What is the probability that a randomly thrown dart hits the square board in shaded region (Take π = (22)/(7) and express in percentage)

A box has come black balls and 30 white balls. If the probability of drawing of a black ball is 2/5 th the probability of drawing of a white ball, find the number of black balls in the box.

A bag has cards numbered from 1 to 49. if a card is drawn at random from the bag after mixing them throughly, find the probability that the number on the card is (i) odd (ii) a multipel of 5 (iii) a perfect square (iv) an even prime number.

A number is selected at random from 1 to 50. What is the probability that it is (a) a prime number (b) not a perfect cube (c) a perfect square (d) a triangular number (e) a multiple of 6 (f) not a multiple of 2

What is the probability that two friends their birthdays i] on the samy day? ii] on different days (ignoring the leap year)

Five cards - then ten, jack, queen, king and ace of diamonds, are well shuffled with their face downwards. One card is then picked up at random. (i) What is the probability that the card is the queen? (ii) If the queen is drawn and put side, what is the probability that the second card picked up is (a) an ace? (b) a queen?

A die is thrown twice. What is the probability that 5 will come up at least once?

A bag contians 8 red and 5 white balls. Three balls are drawn at random. Find the probability that (i) all the three balls are white. (ii) all the three balls are red. (iii) one ball is red and two balls are white.

Read the following passage and answer the questions given at the end. A game booth at Diwali fair involves using a spinnerr first. Then if the spinner stops on an even number the player is allowed to pick a marble from a box. The spinner and the marbles in the box are represented in figure. prizes are given, when black marble is picked. shweta plays the game once. i] What is the probability that she will be allowed to pick a marble from the box? ii} Suppose she is allowed to pick a marble from the box, what is the probability of getting a prize, when it is given that the box contains 20 balls out of which 6 are Black?

In a bag there are 44 identical cards with the figure of a circle or a square on them. There are 24 circles of which 9 are blue and the rest are green and 20 squares of which 11 are blue and the rest are green. One card is drawn from the bag at random. find the probability that it has the figure of a (i) square (ii) green colour (iii) blue circle (iv) green square.