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- Question
- In a class, there are 80 students and their average marks in the annual examination are 40. If the average marks of passed students are 60 and average marks of failed students are 35, then find out the number of students who failed.
Options- A. 63
- B. 60
- C. 72
- D. 64
- Correct Answer
- 64
ExplanationLet the number of failed student = Y
? Number of passed student = 80 - Y
sum of marks of all students = sum of marks of passed students + sum of marks of failed students
80 x 40 = (80 - Y) x 60 + 35Y
? 3200 =4800 - 60Y + 35Y
? 25Y = 1600
? Y = 64
? Number of students who failed = 64 - 1. What value should come in place of the question mark(?) in the following question? (?) - 19657 - 33994 = 9999
Options- A. 63650
- B. 53760
- C. 59640
- D. 61560
- E. None of these Discuss
- 2. What value should come in place of the question mark(?) in the following question? (?) + 3699 + 1985 - 2047 = 31111
Options- A. 34748
- B. 27474
- C. 30154
- D. 27574
- E. None of these Discuss
- 3. What value should come in place of the question mark(?) in the following question?
250 / √ ? = 10
Options- A. 25
- B. 250
- C. 625
- D. 2500 Discuss
- 4. What value should come in place of the question mark(?) in the following question?
? + 6207 - 9038 = 107
Options- A. 2724
- B. 2938
- C. 2814
- D. None of these Discuss
- 5. What value should come in place of the question mark(?) in the following question?
? - 4799 = 1714
Options- A. 6513
- B. 7403
- C. 3085
- D. None of these Discuss
- 6. What value should come in place of the question mark(?) in the following question?
9501 -? = 3697
Options- A. 13198
- B. 5814
- C. 5804
- D. 4894 Discuss
- 7. What value should come in place of the question mark(?) in the following question?
66066 + 6606 + 66 + 6 =?
Options- A. 258126
- B. 72744
- C. 72798
- D. None of these Discuss
- 8. What value should come in place of the question mark(?) in the following question?
? x 48 = 173 x 240
Options- A. 545
- B. 685
- C. 865
- D. 495 Discuss
- 9. What value should come in place of the question mark(?) in the following question?
? x 11 = 555555
Options- A. 505
- B. 5050
- C. 50505
- D. 5005 Discuss
- 10. What value should come in place of the question mark(?) in the following question?
87 x? = 3393
Options- A. 39
- B. 49
- C. 27
- D. 67 Discuss
More questions
Correct Answer: 63650
Explanation:
19657 Let x - 53651 = 9999 33994 Then, x = 9999 + 53651 = 63650 ----- 53651 -----
Correct Answer: 27474
Explanation:
x + 3699 + 1985 - 2047 = 31111
⟹ x + 3699 + 1985 = 31111 + 2047
⟹ x + 5684 = 33158
⟹ x = 33158 - 5684 = 27474.
Correct Answer: 25
Explanation:
Let 250 / √x = 10.
Then √x= 250 / 10 = 25
∴ x = 625
Correct Answer: 2938
Explanation:
Let x + 6207 - 9038 = 107
Then x = (107 +9038) - (6207)
= 2938
Correct Answer: 6513
Explanation:
Let x - 4799 = 1714
Then, x = 4799 + 1714
= 6513.
Correct Answer: 5804
Explanation:
Let 9501 - x = 3697
Then x = 9501 - 3697
= 5804
Correct Answer: 72744
Explanation:
66066 + 6606 + 66 + 6 = 72744
Correct Answer: 865
Explanation:
Let y x 48 = 173 x 240
Then y = (173 x 240) / 48
=173 x 5
= 865 .
Correct Answer: 50505
Explanation:
Let N x 11 = 555555
Then N = 555555 / 11 = 50505.
Correct Answer: 39
Explanation:
Let 87 x N = 3393
Then, N = 3393 / 87 =39 .
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