Aptitude Preparation: Mock Test, IT Campus Placement, Aptitude Questions and Answers
Subject: Probability 2
Part 2: List for questions and answers of Probability
Q1. A bag contains 6 white and 4 black balls .2 balls are drawn at random. Find the probability that they are of same colour.
a) 1/2
b) 7/15
c) 8/15
d) 1/9
Q2. A problem is given to three students whose chances of solving it are 1/2, 1/3 and ¼ respectively. What is the probability that the problem will be solved?
a) 1/4
b) 1/2
c) 3/4
d) 7/12
Q3. Two cards are drawn at random from a pack of 52 cards.what is the probability that either both are black or both are queen?
a) 52/221
b) 55/190
c) 55/221
d) 19/221
Q4. In a lottery, there are 10 prizes and 25 blanks. A lottery is drawn at random. What is the probability of getting a prize?
a) 2/7
b) 5/7
c) 1/5
d) 1/2
Q5. Two dice are tossed. The probability that the total score is a prime number is:
a) 5/12
b) 1/6
c) 1/2
d) 7/9
Q6. A bag contains 4 white, 5 red and 6 blue balls. Three balls are drawn at random from the bag. The probability that all of them are red, is:
a) 2/91
b) 1/22
c) 3/22
d) 2/77
Q7. What is the probability of getting 53 Mondays in a leap year?
a) 1/7
b) 3/7
c) 2/7
d) 1
Q8. Two dice are thrown together .What is the probability that the sum of the number on the two faces is divided by 4 or 6.
a) 7/18
b) 14/35
c) 8/18
d) 7/35
Q9. In a class, there are 15 boys and 10 girls. Three students are selected at random. The probability that 1 girl and 2 boys are selected, is:
a) 21/46
b) 1/5
c) 3/25
d) 1/50
Q10. Two cards are drawn together from a pack of 52 cards. The probability that one is a spade and one is a heart, is:
a) 3/20
b) 29/34
c) 47/100
d) 13/102
Q11. A bag contains 6 black and 8 white balls. One ball is drawn at random. What is the probability that the ball drawn is white?
a) 3/7
b) 4/7
c) 1/8
d) 3/4
Q12. Four dice are thrown simultaneously. Find the probability that all of them show the same face.
a) 1/216
b) 1/36
c) 2/216
d) 4/216
Q13. If two letters are taken at random from the word HOME, what is the probability that none of the letters would be vowels?
a) 1/6
b) 1/2
c) 1/3
d) 1/4
Q14. A speaks truth in 75% of cases and B in 80% of cases. In what percentage of cases are they likely to contradict each other, narrating the same incident
a) 30/100
b) 35/100
c) 45/100
d) 50/100
Q15. One card is drawn at random from a pack of 52 cards. What is the probability that the card drawn is a face card (Jack, Queen and King only)?
a) 3/13
b) 1/13
c) 3/52
d) 9/52
Q16. Two dice are thrown simultaneously. What is the probability of getting two numbers whose product is even?
a) 3/4
b) 3/8
c) 5/16
d) 2/7
Q17. In a simultaneous throw of pair of dice. Find the probability of getting the total more than 7.
a) 1/2
b) 5/12
c) 7/15
d) 3/12
Q18. In a box, there are 8 red, 7 blue and 6 green balls. One ball is picked up randomly. What is the probability that it is neither red nor green?
a) 1/3
b) 3/5
c) 8/21
d) 7/21
Q19. A word consists of 9 letters; 5 consonants and 4 vowels.Three letters are choosen at random. What is the probability that more than one vowel will be selected ?
a) 13/42
b) 17/42
c) 5/42
d) 3/14
Q20. A bag contains 2 red, 3 green and 2 blue balls. Two balls are drawn at random. What is the probability that none of the balls drawn is blue?
a) 10/21
b) 11/21
c) 1/2
d) 2/7
Part 2: List for questions and answers of Probability
Q1. Answer:b
Q2. Answer:c
Q3. Answer:a
Q4. Answer:a
Q5. Answer:a
Q6. Answer:a
Q7. Answer:c
Q8. Answer:a
Q9. Answer:a
Q10. Answer:d
Q11. Answer:b
Q12. Answer:a
Q13. Answer:a
Q14. Answer:b
Q15. Answer:a
Q16. Answer:a
Q17. Answer:b
Q18. Answer:a
Q19. Answer:b
Q20. Answer:a