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Question 1
The average marks of 48 students in a class is 45. The average marks of the boys in the class is 40 and the average marks of the girls in the class is 50. What is the ratio between the number of boys and girls in the class?
Question 2
Rahul purchased 124 notebooks, Sunil purchased 86 notebooks, Manish purchased 132 notebooks and Mona purchased 146 notebooks. What was the average number of notebooks they purchased?
Question 3
The mean of 19 observations is 24. If the mean of the first 10 observations is 17 and that of the last 10 observations is 24, find the 10th observation.
Question 4
The average weight of 17 boxes is 92 kg. If 18 new boxes are added, the new average increases by 3 kg. What will be the average weight of the 18 new boxes?(approximate)
Question 5
The average of odd numbers upto 100 is how much?
Question 6
The average wage of a worker for 15 days was Rs. 95 per day. During the first 7 days, his average wage was Rs. 92 per day and the average wage during the last 7 days was Rs. 97 per day. What was his wage on 8th day?
Question 7
The average wage of 500 workers was found to be Rs.200. Later on it was discovered that the wages of two workers were misread as 180 and 20 instead of 80 and 220. The correct average wage is:
Question 8
Rohit Sharma has a certain average of runs for 14 innings. In a match against Australia he played his 15th inning in which he was awarded man of the match for scoring 72 runs, thereby increasing his average by 2 runs. Find his average after playing with Australia.
Question 9
Average marks of 60 students of a class is recorded as 65 out of 100. But later it was found that, marks of 3 students was mistakenly recorded as 75%, 96% and 94% of what they actually got. If their original marks are 80, 50 and 50 respectively. then find the approximate correct average marks.
Question 10
The average of five consecutive even numbers v, w, x, y and z is 86. What would be the product of x and y?
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Apr 13SSC & Railway
