Discussion
Home ‣ Aptitude ‣ Probability See What Others Are Saying!
- Question
- The probability of occurrence of an event A is 5/9 . The probability of non-occurrence of the event B is 5/11. The probability that at least one of them will occur?
Options- A. 6/11
- B. 5/9
- C. 4/9
- D. 0.8
- Correct Answer
- 0.8
Explanation? P(A) = 5/9
? P(A) = 1- 5/9 = 4/9
? P(B) = 5/11
? P(B) = 1 - 5/11 = 6/11
Probability that none of them will occur = P(A ? B) = 4/9 x 5/ 11 = 20/99
Hence, Reqd. probability = 1-20/99 = 79//99
= 0.798 which is near 0.8. - 1. 3, 5, 7, 12, 17, 19
Options- A. 19
- B. 17
- C. 5
- D. 12 Discuss
- 2. A and B can do a piece of work in 30 days, while B and C can do the same work in 24 days and C and A in 20 days. They all work together for 10 days when B and C leave. How many days more will A take to finish the work?
Options- A. 18 days
- B. 24 days
- C. 30 days
- D. 36 days Discuss
- 3. The number ( 6x 2 + 6x ) for natural number x is always divisible by ...
Options- A. 6 and 12
- B. 12 only
- C. 6 only
- D. 3 only Discuss
- 4. In the year 2011, Shantanu gets ? 3832.5 as his pocket allowance. Find his pocket allowance per day.
Options- A. ? 9.5
- B. ? 10.5
- C. ? 12.5
- D. ? 11.5 Discuss
- 5. The breadth of a rectangle is 25 m. The total cost of putting a grass bed on this field was ? 12375, at the rate of ? 15 per sq m. What is the length of the rectangular field?
Options- A. 27 m
- B. 30 m
- C. 33 m
- D. 32 m Discuss
- 6. The number of prime factors in the expression (6) 10 x (7) 17 x (11) 27 is?
Options- A. 54
- B. 64
- C. 71
- D. 81 Discuss
- 7. A bag contains 7 white and 9 red balls. The probability of drawing a white ball is?
Options- A. 1/16
- B. 1/52
- C. 7/52
- D. 7/16 Discuss
- 8. (5568 / 87) 1/3 + (72 x 2) 1/2 = (?) 1/2?
Options- A. 256
- B. 4
- C. ?2
- D. 16 Discuss
- 9. The probability of getting heads in both trials when a balanced coin is tossed twice will be?
Options- A. 1/4
- B. 1/2
- C. 1
- D. 3/4 Discuss
- 10. The simple interest on a sum of money at 9% per annum for 5 yr is half the sum. What is the sum?
Options- A. ? 5800
- B. ? 5000
- C. ? 7000
- D. Data is inadequate Discuss
More questions
Correct Answer: 12
Explanation:
Correct Answer: 18 days
Explanation:
| 2(A + B + C)'s 1 day's work = | ❨ | 1 | + | 1 | + | 1 | ❩ | = | 15 | = | 1 | . |
| 30 | 24 | 20 | 120 | 8 |
| Therefore, (A + B + C)'s 1 day's work = | 1 | = | 1 | . |
| 2 x 8 | 16 |
| Work done by A, B, C in 10 days = | 10 | = | 5 | . |
| 16 | 8 |
| Remaining work = | ❨ | 1 - | 5 | ❩ | = | 3 | . |
| 8 | 8 |
| A's 1 day's work = | ❨ | 1 | - | 1 | ❩ | = | 1 | . |
| 16 | 24 | 48 |
| Now, | 1 | work is done by A in 1 day. |
| 48 |
| So, | 3 | work will be done by A in | ❨ | 48 x | 3 | ❩ | = 18 days. |
| 8 | 8 |
Correct Answer: 6 and 12
Explanation:
6x2 + 6x = 6x( x + 1 ) which is clearly divisible by 6 and 12 as x( x + 1 ) is even.
Correct Answer: ? 10.5
Explanation:
Shantanu's pocket allowance = ? 3832.50
Total days in 2011 (general year) = 365 days
Allowance per day = 3832.5/365 = ? 10.5
Correct Answer: 33 m
Explanation:
Area to the rectangular field = 12375/15 = 825 sq m
According to the question,
(L x B) = 825 [L = length and B = breadth]
? L x 25 = 825
? L = 825/25 = 33 m
Correct Answer: 64
Explanation:
Since 2, 3, 7, 11 are prime numbers and the given expression is
210 x 310 x 717 x 1127
So the number of prime factors in the given expression is (10 + 10 + 17 + 27 ) = 64.
Correct Answer: 7/16
Explanation:
No of white balls = 7
Red balls = 9
Total no. of balls = 7 + 9 = 16
Probability of drawing a white ball = 7/16
Correct Answer: 256
Explanation:
(?)1/2 = (5568 / 87)1/3 + (72 x 2)1/2
= (64)1/3 + (144)1/2
? ? = (4 + 12)2 = 256
Correct Answer: 1/4
Explanation:
Probability of getting head in one trail = 1/2
? Reqd Probability of getting heads in both the trails = 1/2 x 1/2 = 1/4
Correct Answer: Data is inadequate
Explanation:
Let the sum be P.
? SI = P/2
? P/2 = (P x 9 x 5)/100
Clearly data is inadequate.
Comments
There are no comments.More in Aptitude:
Programming
Copyright ©CuriousTab. All rights reserved.