1. Two different coins are tossed simultaneously. The probability of getting at least one head
is (    )

               
2. A box contains 40 discs, numbered from 1 to 40. If one disc is drawn at random from the box, the probability that it bears a prime number less than 23 is  (    )

               
 

3. If two different dice are rolled together, the probability of getting an even number on both dice is    (    )
                
 

4. In a family of 3 children, the probability of having at least one boy is    (    )

 

5. The probability that a number selected at random from the numbers 1, 2, 3,...., 15 is a multiple of 4 is     (    )

6. What is the probability that a leap year has 53 sundays?   (    )

                     
7. The probability of a certain event is          (    )

                      
8. A card is drawn at random from a pack of 52 cards. The probability that the drawn card is not an ace is    (    )

9. A number is selected at random from the numbers 1 to 30. The probability that it is a prime number is (    )

10. A bag contains cards numbered from 1 to 25. A card is drawn at random from the bag. The probability that the number on this card is divisible by both 2 and 3 is (    )

11. In a single throw of a dice, the probability of getting a multiple of 3 is  (    )

       
12. If three coins are tossed simultaneously, then the probability of getting at least two heads is    (    )

13. The probability of guessing the correct answer to a certain test questions is  . If the probability of not guessing the correct answer to this question is . Then x =   (    )
 1) 4      2) 3         3) 6        4) 2
14. A number is selected at random from the numbers 3, 5, 5, 7, 7, 7, 9, 9, 9, 9. The probability that the selected number is their mean is   (    )

                 
15. Which of the following cannot be the probability of an event?  (    )

                  
16. The probability of an impossible event is (    )

 

17. What is the probability that a non-leap year has 53 fridays? (    )

                     
18. A month is selected at random in a year. The probability that it is March or May is (    )

                            
19. From the letters of the word 'PRATIBHA', a letter is selected. The probability that the letter is a vowel   (    )

                           
20. If a two digit number is chosen at random, then the probability that the number chosen is a multiple of 10 is    (    )

Answers: 1-4; 2-3; 3-4; 4-1; 5-2; 6-3; 7-1; 8-4.; 9-3; 10-3; 11-2; 12-4.; 13-3; 14-2; 15-4; 16-1; 17-4; 18-2; 19-1; 20 -3.
 

Writer: T.S.V.S. Suryanarayana Murthy