a) 1628.4 b) 1534 c) 1496 d) None of these Answer: d Explanation: Let average expenditure of 19 people ...
View QuestionThe average monthly salary of 660 workers in a factory is Rs. 380. The average monthly salary of officers is Rs. 2100 and the average monthly salary of the other workers is Rs. 340. Find the number of other workers.
a) 645 b) 650 c) 640 d) 642 Answer: a Explanation: $$\eqalign{ & {\text{Total}}\,{\text{salary}}\,{\text{of}}\,660\,{\text{workers}} \cr ...
View QuestionThe average of 20 students is 12 years, if the teacher’s age is included, average increases by one. The age of the teacher is:
a) 28 years b) 30 years c) 33 years d) 35 years Answer: c Explanation: Average of 20 students ...
View QuestionThe average weight of 47 balls is 4 g. if the weight of the bag (in which the balls are kept) be included; the calculated average weight per ball increases by 0.3 g. What is the weight of the bag?
a) 14.8 g b) 14.4 g c) 15 g d) 14.1 g Answer: d Explanation: Total increased ...
View QuestionFind the average increase rate, if increase in the population in the first year is 30% and that in the second year is 40%.
a) 41% b) 56% c) 40% d) 38% Answer: a Explanation: Let 100 be the original population. 1st year's population ...
View QuestionThe average marks of four subjects is 120. If 33 was misread as 13 during the calculation, what will be the correct average?
a) 122 b) 120 c) 125 d) 121 Answer: c Explanation: $$\eqalign{ & {\text{Correct average}} \cr ...
View QuestionThe average income of A, B and C is Rs. 12,000 per month and average income of B, C and D is Rs. 15,000 per month. If the average salary of D be twice that of A, then the average salary of B and C is in Rs. :
a) 13,500 b) 9,000 c) 8,000 d) 18,000 Answer: a Explanation: $$\eqalign{ ...
View QuestionThe mean weight of 100 students in a class is 46 kg. The mean weight of boys is 50 and of girls is 40 kg. Therefore, the number of boys is:
a) 50 b) 60 c) 70 d) 65 Answer: b Explanation: Let number of boys are x ...
View QuestionThere are five boxes in cargo hold. The weight of the first box is 200 kg and the weight of the second box is 20% higher than the weight of the third box, whose weight is 25% higher than the first box’s weight. The fourth box at 350 kg is 30% lighter than the fifth box. Find the difference in the average weight of the four heaviest boxes and the four lightest boxes.
a) 51.5 kg b) 75 kg c) 37.5 kg d) 112.5 kg Answer: b Explanation: The weight of boxes ...
View QuestionFive years ago, the average age of A, B, C and D was 45 yr. with E joining them now, the average of all the five is 49 yr. How old is E?
a) 45 years b) 25 years c) 64 years d) 40 years Answer: a Explanation: Total present age of ...
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