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Q1. If the algebraic sum of deviations of 20 observations measured from 23 is 80, Then the mean of these observations would be
1. 20 2. 22 3. 24 4. 26 5. None of the above
Q2. The average of four consecutive numbers W, X, Y and Z is 50. What is the product of X and Z? (appx.)
1. 2459 2. 2350 3. 2450 4. 2549 5. None of the above
Q3. The average marks of 40 students are 45 but after checking, two student’s marks were corrected. After correction, if a student got 45 more marks and other student got 15 less marks, then what will be the adjusted average?
1. 55 2. 54 3. 57 4. 58 5. 59
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Q4. The average weight of 21 girls was recorded as 64 kg. If the weight of the Maths teacher was added, the average increased by two kg. What was the teacher’s weight?
1. 86 kg 2. 92 kg 3. 98 kg 4. 108 kg 5. 114 kg
Q5. The average temperature of Mount Abu for four days in a particular month is 48°C. If the average temperature of second and third days is 34°C and the ratio of the temperatures of first and fourth days is 9 : 11, then find out the temperatures of first and fourth days(appx.).
1. 45°C, 50°C 2. 32°C, 40°C 3. 43°C, 68°C 4. 52°C, 47°C 5. 56°C, 68°C
Q6. A man travels in his car and covers 1/4 part of his journey with 8 km/h, 3/5 part with 6 km/h and remaining 3/20 part with a speed of 10 km/h. Find out his average speed during the whole journey. .
1. 6.83 km/h 2. 8.47 km/h 3. 9.12 km/h 4. 8.56 km/h 5. None of the above
Q7. The average runs scored by a batsman in 42 innings, is 30. The difference between his maximum and minimum scores in an innings is 100. If these two innings are not considered, then the average score of remaining 40 innings is 28. Calculate the minimum runs scored by him in an innings?
1. 25 2. 20 3. 10 4. 15 5. 5
Q8. If a + b + c = 13, then the maximum value of (a – 2) (b + 1) (c – 3) is
1. 25 2. 30 3. 37 4. 27 5. 47
Q9. The average weight of 4 men P, Q, R and S, is 67 kg. The 5th man T is included and the average weight decreases by 2 kg. P is replaced by U. The weight of U is 4 kg more than T. Average weight decreases because of the replacement of P and now the average weight is 64 kg. Find the weight of P.
1. 76 kg 2. 66 kg 3. 71 kg 4. 78 kg 5. 68 kg
Q10. The average weight of the students in four classes W, X, Y and Z is 60 kg. The average weight of the students of each classes are 45 kg, 50 kg, 72 kg and 80 kg, respectively. If the average weight of the students of W and X together is 48 kg, and that of X and Y together is 60 kg, what is the ratio of the number of students in sections W and Z?
1. 2 : 7 2. 4 : 3 3. 3 : 5 4. 8 : 5 5. None of these
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