Class 11 CBSE Applied Maths Quantitative Aptitude Exercise 3.1
Class 11 CBSE Applied Maths aims to develop an understanding of basic
mathematical and statistical tools and their
applications in the field of commerce (business/ finance/economics) and social
sciences. Topics covered in Class 11th Applied Maths includes : Numbers, Quantification and
Numerical Applications, Algebra, Calculus, quan Distributions , Inferential Statistics, Index
Numbers and Time-based data , Financial Mathematics , Linear Programming.
Please Select
Q1. Find the mean of first twelve natural numbers
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Q2. Find the average of first seven odd prime numbers.
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Q3. Find the mean of the (positive) factors of 24
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Q4. 5 people were asked about the time in a week they spend in doing social work in their community. They replied 10, 7, 13, 20 and 15 hours, respectively. Find the average time in a week devoted by them for social work
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Q5. The mean of 6 observations is 17.5. If five of them are 14, 9, 23, 25 and 10, find the sixth observation
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Q6. The average of 25 observations is 27. If one observation is included, the average still remains 27. Find the included observation
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Q7. The average of five numbers is 87. If one of the numbers is excluded, then the average gets decreased by 5. Find the excluded number.
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Q8. A nursery is closed on Sunday. The average plants sold in the remaining six days of a week is 156 plants and the average sale from Monday to Friday is 124 plants. Find the number of plants sold on Saturday
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Q9. The average of five consecutive numbers is 125. Find the product of the number at the extreme positions.
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Q10.
The following are the weights (in kg) of 8 students of a class:
50, 44.5, 48.7, 45.1, 50.4, 43, 51, 49.3
(i) Find the average weight.
(ii) If a teacher, whose weight is 62, is also included then what will be the average
weight?
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Q11. The average height of 10 students is 151.8 cm. Two more students of heights 157.6 cm and 154.4 cm join the group. What is the new average height?
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Q12. The mean marks of boys and girls in an examination are 70 and 73 respectively. If tne mean marks of all the students in that examination are 71. find the ratio of number of boys to tuie number of girls
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Q13. The average age of three students Vijay, Rahul and Rakhi is 15 years. If their ages are in the ratio 4:5:6 respectively, then find their ages
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Q14. The average of 19 observation is 54. If the average of first 10 observations is 56 and that of last 10 observations is 53. Find the tenth observation.
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Q15. Average of 9 observations was found to be 35. Later on, it was detected that an observation 81 was misread as 18. Find the correct average
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