David got two and a half times as many marks in English as in History. If his total marks in the two subjects are 140, the marks obtained by him in English are:
40
75
90
100
A pupil's marks were wrongly entered as 83 instead of 63. Due to that the average marks for the class got increased by half. The number of pupils in the class is:
10
20
73
None of the above
If √2 = 1.4142, the value of 7/(3 + √2) is:
1.5858
3.4852
3.5858
4.4142
By selling 75 toys a shopkeeper gains the selling price of 25 toys. Find his gain percent
20%
25%
50%
75%
Garima purchased a briefcase with an additional 10% discount on the reduced price after deducting 20% on the labeled price. If the labeled price was Rs. 1400, at what price did she purchase the briefcase?
Rs. 980
Rs. 1008
Rs. 1056
None of these
Of the four number, whose average is 60, the first is one-fourth of the sum of the last three. The first number is:
15
45
48
60.25
The average monthly income of P and Q is Rs. 5050. The average monthly income of Q and R is Rs. 6250 and the average monthly income of P and R is Rs. 5200. The monthly income of P is:
Rs. 3500
Rs. 4000
Rs. 4050
Rs. 5000
A student's mark was wrongly entered as 83 instead of 63. Due to that the average marks for the class got increased by half 1/2. What is the number of students in the class?
35
30
There are three classes X,Y and Z. Average of class X is 83. Average of Class Y is 76. Average of class Z is 85. Average of class X and Y is 79, average of class Y and Z is 81. Find average of three Classes
81
81.5
82
84
The average age of 30 students is 9 years .If the age of their teacher is included ,it becomes 10 years . The age of the teacher (in years ) is
27
31
The mean of 50 observations was 36. It was found later that an observation 48 was wrongly taken as 23. The corrected new mean is:
35.2
36.1
36.5
39.1
The average weight of 16 boys in a class is 50.25 kg and that of the remaining 8 boys is 45.15 kg. Find the average weights of all the boys in the class
47.55 kg
48 kg
48.55 kg
49 kg
The average price of 10 books is Rs. 12 while the average price of 8 of these books is Rs. 11.75. Of the remaining two books, if the books, if the price of one book is 60% more than the price of the other, what is the price of each of these two books?
Rs. 5, Rs. 7.50
Rs. 8, Rs. 12
Rs. 10, Rs. 16
Rs. 12, Rs.14
Even after reducing the marked price of a transistor by Rs. 32, a shopkeeper makes a profit of 15%. If the cost price be Rs. 320, what percentage of profit would he have made if he had sold the transistor at the marked price?
10%
A person purchases 90 clocks and sells 40 clocks at a gain of 10% and 50 clocks at a gain of 20%. If he sold all of them at a uniform profit of 15%, then he would have got Rs. 40 less. The cost price of each clock is:
Rs. 50
Rs. 60
Rs. 80
Rs. 90
The average height of 25 boys is 1.4 m. When 5 boys leave the group, then the average height increase by 0.15 m. What is the average height of the 5 boys who leave ?
0.8 m
0.9 m
0.95 m
1.05 m
3500
4000
4050
5000
A car travels a distance of 120 Km at the rate of 30 Km/h. It covers the nest 150 Km at the rate of 25 km/h and the last 90 Km of its journey at the speed of 18 Km/h. what is the average speed of the car?
20 Km/h
25 Km/h
30 Km/h
24 Km/h
35 Km/h
The average age of A and B is 20-years. If C were to replace A, the average would be 19 and if C were to replace B, the averge wouldbe21. What are the age ofA, Band C?
22,18,20
20,20,18
18,22,20
21,20,19
The average age of husband, wife and their child 3 years ago was 27 years and that of wife and the child 5 years ago was 20 years. What is the present age of the husband?
32
28
26
A test has 50 questions. A student scores 1 mark for a correct answer, -1/3 for a wrong answer,and –1/6 for not attempting a question. If the net score of a student is 32, the number of questions answered wrongly by that student cannot be less than
6
12
3
9
A team of 8 persons joins in a shooting competition. The best marksman scored 85 points. If he had scored 92 points, the average score for the team would have been 84. The number of points, the team scored was
588
645
665
672
A student was asked to find the arithmetic mean of the numbers 3, 11, 7, 9, 15, 13, 8, 19, 17, 21, 14 and x. He found the mean to be 12. What should be the number in place of x ?
7
17
In an examinations, a pupil’s average marks were 63 per paper. If he had obtained 20 more marks for his Geography paper and 2 more marks for his History paper, his average per paper would have been 65. How many papers were there in the examination?
8
11
The average of eight numbers is 14. The average of six of these numbers is 16.The average of the remaining two numbers is
4
16
none
The average of 10 scores is 80. When the highest and the lowest scores are dropped the average is 81. If the highest score is 92, find the lowest score.
80
78
76
60
If he is able to sell only 1200 out of the 1500 watches he has made in the season, then in the season he has made a profit of:
Rs. 90,000
Rs. 75,000
Rs. 45,000
Rs. 60,000
When a commodity is sold for Rs. 34.80, there is a loss of 2%. What is the cost price of the commodity?
Rs.26.10
Rs. 43
Rs. 43.20
Rs. 46.40
In Arun's opinion, his weight is greater than 65 kg but less than 72 kg. His brother doest not agree with Arun and he thinks that Arun's weight is greater than 60 kg but less than 70 kg. His mother's view is that his weight cannot be greater than 68 kg. If all are them are correct in their estimation, what is the average of different probable weights of Arun?
67 Kg
68 Kg
69 Kg
70 Kg
Marks obtained by Komal in English are equal to 1/3rd of marks obtained by her in Music. Total marks obtained by her in both the subjects is 160. How many marks did she secure in Music?
120