Test Preparation on Olympiad Mathematics Class-9 Paper-5
1.
From a pack of 52 cards, two cards are drawn together at random. What is the probability of both the cards being kings?
2.
An urn contains 6 red, 4 blue, 2 green and 3 yellow marbles. If 4 marbles are picked up at random, what is the probability that at least one of them is blue?
3.
In a simultaneous throw of two coins, the probability of getting at least one head is-
4.
A bag contains 4 red balls, 6 blue balls and 8 pink balls. One ball is drawn at random and replaced with 3 pink balls. A probability that the first ball drawn was either red or blue in colour and the second drawn was pink in colour ?
