No.  Problems & Solutions [Click Hide/Show to display the solutions below the question]  

01. 
Determine the probability that a digit chosen at random from the digits 1, 2, 3, ... , 9 will be
a) odd b) even c) a multiple of 3
Solution


02. 
A card is drawn from a pack of 52 cards numbered 2 to 53. the probability and odds that the number on the card is a prime number less than 20 is
Solution


03. 
One hundred tickets are numbered as 00, 01, 02, ... , 09, 10, 11, ... , 99. If one ticket is drawn at random from them and if "A" is the event of getting 9 as the sum of the numbers on the tickets and "B" the event of the product of the numbers on the card being 0, then P(A) = ? and P(B) = ?
Solution


04. 
If one ticket is drawn at random from a bag containing 20 tickets numbered 1 to 20 the probability that it is a multiple of 5 or 7 is
Solution


05. 
An urn contains 13 balls numbered from 1 to 13. Find the probability that a ball selected at random is a ball with a number that is a multiple of 3 or 4.
Solution


06. 
An integer is chosen at random from the first hundred positive integers. The probability that the integer chosen is divisible by 6 or 8 is ?
Solution


07. 
Each of the two digit numbers than can be formed from the integers 1 to 9 no digit repeated, is written on a card. Then all the cards are thoroughly shuffled and stacked. If one card is drawn from the stack, find the probability that the sum of the digits in the number on it will be 10.
Solution


08. 
A number x is chosen at random out of the natural numbers 1, 2, 3,... 100
Solution


09. 
Solution

No.  Problems for Practice  

01. 
The probability that a number selected at random from the set of numbers {1, 2, 3, ..., 100} is a cube is ...


02. 
A card is drawn from pack of 1000 cards numbered 1 to 1000. Find the probability of drawing a number divisible by 13.


03. 
If a number is selected at random from the natural numbers 1 to 10, then find the probability for the number to be (a) a prime number (b) a perfect square.


04. 
A bag contains 20 tickets with marked numbers 1 to 20. One ticket is drawn at random. Find the probability that it will be a multiple of (i) 2 or 5 (ii) 3 or 5


05. 
A number x is chosen at random out of the natural numbers 1, 2, 3,... 100


06. 

Author Credit : The Edifier 