Welcome to your Probability(Senior Class Maths Study by Topics) NAME EMAIL PHONE NUMBER 1. Two fair coins are tossed. The probability of getting at least one tail is 2/3 3/4 1/4 1/2 None 2. Cards are drawn from a pack of 52 playing cards one at a time. Calculate the probability of drawing without replacement 2 red cards 17/100 1/3 25/102 19/200 None 3. Two cards are drawn, one after the other, with replacement from a pack of 52 cards containing four aces and four queens. The probability that the cards are either both aces or both queens is 2/221 2/13 2/169 4/13 None 4. A number is selected randomly from the set of integers 1 to 20 inclusive. The probability that the number is prime is 9/20 7/20 2/5 1/2 None 5. Two dice, one red and the other blue are rolled together. Find the probability of obtaining a total score of 7 1/5 1/6 1/3 1/4 None 6. A box contains 5 blue balls, 3 black balls and 2 red balls of the same size. A ball is selected at random from the box and then replaced. A second ball is then selected. Find the probability of obtaining two blue balls or two black balls 20/21 17/50 1/6 7/23 None 7. A bag containing 5 red balls and 3 green balls. Two balls are picked, one after the other, with replacement. The probability that both are the same colour is 9/64 17/32 15/64 25/64 None 8. Two dice, one red and the other blue are rolled together. Find the probability of getting two odd numbers 1/3 1/4 1/6 1/5 None 9. A card is drawn from an ordinary pack of 52 playing cards. Find the probability that it is neither a seven nor a Diamond 9/13 1/52 4/13 3/52 None 10. Two numbers are drawn randomly from the four numbers 1, 3, 5 and 8. The probability that the sum of the two is not odd 1/2 2/3 1/3 1/4 None 11. The probability that a baby born by a certain couple will grow up to be tall is 1/4. The probability that the couple will have a tall daughter is 3/8 1/8 1/4 1/2 None 12. A number is selected randomly from the set of integers 1 to 20 inclusive. What is the probability that the number is either a multiple of 3 or a multiple of 5 9/20 3/10 1/2 11/20 None 13. Yusuf threw a die 20 times and obtained the results shown below:Find Yusuf's experimental probability of obtaining 4 or 5 1/4 1/3 2/3 1/2 None 14. A bag contains 6 red balls, 12 white balls and 9 green balls.A ball is selected at random. What is the probability that it is a red or green ball? 2/3 1/3 4/9 5/9 None 15. The chances of occurrence of three independent events X, Y and Z are 1/3, 1/4 and 2/5. What are the chances of occurrence of only Y and Z ? 13/30 1/10 1/30 1/15 None 16. Three balls are drawn one after the other, without replacement from a bag containing 4 blue, 6 white and 5 red identical balls.The probability of picking 2 blue and 1 red ball is 8/273 6/91 2/91 4/225 None 17. A die is rolled 100 times with the following outcomes:Number 1 2 3 4 5 6Frequency 15 20 18 14 17 16The experimental probability of obtaining at most 4 is 0.84 0.67 0.14 0.47 None 18. Four of the faces of a fair die are coloured black and the remaining two faces are coloured white. On throwing the die two consecutive times, the probability that both throws will show a black face is 2/3 1/9 2/9 4/9 None 19. A coin is tossed 3 times. What is the probability of getting 2 heads and a tail in any order? 1/8 1/4 1/2 3/8 None 20. The data below shows the number of students that represented a Government Secondary School in a Mathematics Competition Find the probability that a student picked at random is in SS1 4/12 8/45 4/25 8/25 None 21. The probabilities that a husband and his wife will be alive in 10 years time is 0.7 and 0.8 respectively. What is the probability that at that time none will be alive? 1 0 0.56 0.06 None 22. How many different three-digit numbers can be formed using integers 1 to 6 if no integer occurs twice in a number? 60 240 120 20 None 23. Of the 30 students in a class, 8 surnames begin with A or O and 18 begin with a consonant.No surname begins with any of the letters C,Q,U, V,X,Y and Z.The probability that a surname selected randomly begins with E or I is 3/5 4/15 13/15 2/15 None 24. A bag contains 6 red balls, 9 blue balls and 5 green balls.Two balls are chosen one after the other with replacement. What is the probability that one is blue, the other is green? 9/100 19/100 7/50 27/100 None 25. The data below shows the distribution of workers in a certain secondary school. Teacher 30 Gardeners 15Typists 9 Cleaners 6Clerks 12 Messengers 3If one of the workers is absent from work on one particular day, the probability that he is a clerk is 2/25 4/25 1/25 3/25 None 1 out of 25 Time's upTime is Up!