Averages : Arithmetic Mean, Median, Mode Quant Notes | EduRev

Quantitative Aptitude for SSC CGL

Quant : Averages : Arithmetic Mean, Median, Mode Quant Notes | EduRev

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Averages : Arithmetic Mean, Median, Mode Quant Notes | EduRev

Q.1. The average monthly salary of 12 workers and 3 managers in a factory was Rs. 600. When one of the managers whose salary was Rs. 720, was replaced with a new manager, the average salary of the team went down to Rs. 580. What is the salary of the new manager?
(a) Rs. 570
(b) Rs. 420
(c) Rs. 690
(d) Rs. 640
(e) Rs. 610

Correct Answer is Option (b).

Salary of the new manager is 420.


Q.2. The average wage of a worker during a fortnight comprising 15 consecutive working days was Rs. 90 per day. During the first 7 days, his average wage was Rs. 87/day and the average wage during the last 7 days was Rs. 92/day. What was his wage on the 8th day?
(a) Rs. 83
(b) Rs. 92
(c) Rs. 90
(d) Rs. 97
(e) Rs. 96

Correct Answer is Option (d).

His wage on the 8th day was 97.


Q.3. The average of 5 quantities is 6. The average of 3 of those 5 quantities is 8. What is the average of the remaining two quantities?
(a) 6.5
(b) 4
(c) 3
(d) 3.5
(e) 4.2

Correct Answer is Option (c).

3 is the average of the remaining two quantities.

Try yourself:The average temperature on Wednesday, Thursday, and Friday was 25°. The average temperature on Thursday, Friday, and Saturday was 24°. If the temperature on Saturday was 27°, what was the temperature on Wednesday?
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Try yourself:A class had 9 students. In one test, the class average was 61. One student's paper was scored incorrectly, and the resulting score was raised by 18 points. What is the corrected class average?
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Try yourself:The average age of a group of 12 students is 20 years. If 4 more students join the group, the average age increases by 1 year. The average age of the new students is ____
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Try yourself:When a student weighing 45 kg left a class, the average weight of the remaining 59 students increased by 200 g. What is the average weight of the remaining 59 students?
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Try yourself:Three math classes: X, Y, and Z take an algebra test.
(i) The average score in class X is 83.
(ii) The average score in class Y is 76.
(iii) The average score in class Z is 85.
(iv) The average score of all students in classes X and Y together is 79.
(v) The average score of all students in classes Y and Z together is 81.

What is the average score for all the three classes, taken together?

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Try yourself:The average weight of a class of 24 students is 36 kg. When the weight of the teacher is also included, the average weight increases by 1 kg. What is the weight of the teacher?
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Try yourself:The average of 5 quantities is 10 and the average of 3 of them is 9. What is the average of the remaining 2?
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Try yourself:The average age of a family of 5 members is 20 years. If the age of the youngest member is 10 years, what was the average age of the family just a day before the birth of the youngest member?
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Try yourself:A student finds an average of 10 positive integers. Each integer contains two digits. By mistake, the student interchanges the digits of one number say ba for ab. Due to this, the average becomes 1.8 less than the previous one. What is the difference between the two digits a and b?
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Try yourself:Average cost of 5 apples and 4 mangoes is Rs. 36. The average cost of 7 apples and 8 mangoes is Rs. 48. What is the total cost of 24 apples and 24 mangoes?
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Try yourself:Average weight of 25 boys in a class is 48 kg. The average weight of a class of 40 students is 45 kg. What is the average weight of the 15 girls in the class?
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