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- Question
20 men went to a restaurant. Ninteen of them paid Rs.70 each and the twentieth man paid Rs.90.25 more than the average of all the 20 men. What is the total bill ?
Options- A. Rs. 1495
- B. Rs. 548
- C. Rs. 850
- D. Rs. 1750
- Correct Answer
- Rs. 1495
ExplanationLet the average bill paid by twenty members = 'x'
But 19 men paid each = Rs. 70
20th man paid Rs. 90.25 more than the avg bill of 20 = x + 90.25
20x = 19(70) + x + 90.25
19x = 1330 + 90.25
19x = 1420.25
x = 1420.25/19 = Rs. 74.75But the total bill = 20 x 74.75 = Rs. 1495.
- 1. 8 years ago there were 5 members in the Arthur's family and then the average age of the family was 36 years. Mean while Arthur got married and gave birth to a child. Still the average age of his family is same now. What is the age of his wife at the time of his child's birth was.If the difference between the age of her child and herself was 26 years.
Options- A. 25 years
- B. 26 years
- C. 20 years
- D. can't be determined Discuss
- 2. The average value of property of Mittal, Ambani and Singhania is Rs.11111 crore. The property of Singhania is as less than the property of Mittal is greater than the average property of both the Singhania and Mittal. The value of property of Ambani is :
Options- A. Rs.111 crore
- B. Rs. 1111 crore
- C. Rs. 11111 crore
- D. can't be determined Discuss
- 3. Sriram was conducting an experiment in which the average of 11 observations came to be 92, while the average of first five observations was 89, and that of the last five was 86. What was the measure of the 6th observation ?
Options- A. 134
- B. 137
- C. 139
- D. 141 Discuss
- 4. The average monthly salary of 24 employees in an organisation is Rs. 1500. If the manager's salary is added, then the average salary increases by Rs. 400. What is the manager's monthly salary ?
Options- A. Rs. 8840
- B. Rs. 11,500
- C. Rs. 12,800
- D. Rs. 9450 Discuss
- 5. On a school?s Annual day sweets were to be equally distributed amongst 112 children. But on that particular day, 32 children were absent. Thus the remaining children got 6 extra sweets. How many sweets was each child originally supposed to get ?
Options- A. 14
- B. 16
- C. 12
- D. 15 Discuss
- 6. In a class of 100 students, the average weight is 30 kg. If the average weight of the girls is 24 kg and that of the boys is 32 kg, then what is the number of girls in the class?
Options- A. 25
- B. 26
- C. 27
- D. 28 Discuss
- 7. The average of the two-digit numbers, which remain the same when the dibits inter-change their positions, is :
Options- A. 53
- B. 54
- C. 55
- D. 56 Discuss
- 8. The average of 26,29,n,35 and 43 lies between 25 and 35. If n is always an integer and greater than the average of the given integers then the value of n is :
Options- A. 33
- B. 34
- C. 33
- D. None of these Discuss
- 9. A batsman scores 26 runs and increases his average from 14 to 15. Find the runs to be made if he wants top increasing the average to 19 in the same match ?
Options- A. 74
- B. 79
- C. 72
- D. 60 Discuss
- 10. When all the students in a school are made to stand in rows of 54, 30 such rows are formed. If the students are made to stand in rows of 45, how many such rows will be formed ?
Options- A. 22
- B. 36
- C. 32
- D. 26 Discuss
Average problems
Search Results
Correct Answer: 26 years
Explanation:
Since we know that the difference b/w the age of any two persons remains always constant, while the ratio of their ages gets changed as the time changes.
so, if the age of his child be x (presently)
Then the age of wife be x + 26 (presently)
Thus the total age = x + ( x + 26) = 32 [ 252-220 =32]
=> x = 3
Therefore, The age of her child is 3 years and her self is 29 years. Hence her age at the time of the birth of her child was 26 years.
Correct Answer: Rs. 11111 crore
Explanation:
also ( M - 11111 = 11111 - S)
=>A = 11111
Correct Answer: 137
Explanation:
Correct Answer: Rs. 11,500
Explanation:
Manager's monthly salary
= Rs. (1900 x 25 - 1500 x 24) = Rs. 11,500
Correct Answer: 15
Explanation:
Let 'K' be the total number of sweets.
Given total number of students = 112
If sweets are distributed among 112 children,
Let number of sweets each student gets = 'L'
=> K/112 = L ....(1)
But on that day students absent = 32 => remaining = 112 - 32 = 80
Then, each student gets '6' sweets extra.
=> K/80 = L + 6 ....(2)
from (1) K = 112L substitute in (2), we get
112L = 80L + 480
32L = 480
L = 15
Therefore, 15 sweets were each student originally supposed to get.
Correct Answer: 25
Correct Answer: 55
Explanation:
Average = (11 + 22 + 33 + 44 + 55 + 66 + 77 + 88 + 99) / 9
=( (11 + 99) + (22 + 88) + (33 + 77) + (44 + 66) + 55) / 9
= (4 * 110 + 55)/9 = 495 / 9 = 55.
Correct Answer: 33
Explanation:
Average of 26,29,35 and 43 is 33.25 . Also the average of 26 , 29, n, 35 and 43 lies between 25 and 35 i.e,
=> 125 < 26+29+n+35+43 < 175
=> 125 < 133 + n < 175
=> n < 42
Since the value of n is an integer and greater than 33.25 then 33 < n < 42 for every integer n.
Correct Answer: 74
Explanation:
Number of runs scored more to increse the ratio by 1 is 26 - 14 = 12
To raise the average by one (from 14 to 15), he scored 12 more than the existing average.
Therefore, to raise the average by five (from 14 to 19), he should score 12 x 5 = 60 more than the existing average. Thus he should score 14 + 60 = 74.
Correct Answer: 36
Explanation:
Total number of students = 54 x 30
When arranged in rows of 45, number of rows formed are,
= 36.
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