Averages Quiz 4 March 1, 2012 by kumar Leave a Comment 1. The average of first 5 multiples of 3 isA. 3B. 9C. 9.5D. 12 2. The average of 2 numbers is 6.5 and square root of their product is 6.What are the numbers?A. 11 and 4B. 5 and 8C. 9 and 4D. 12 and 5 3. The average of 11 observations is 50.If the average of 1st six observations is 59 and that of the last six is 42,then the sixth one isA. 56B. 46C. 55D. 57 4. The mean of 6,7,8,a,12 is 74,what is the value of a?A. 4B. 6C. 8D. 2 5. The average of 4 consecutive even numbers is 27.what is the largest number?A. 40B. 30C. 20D. 35 6. The sum of 11 consecutive natural numbers is 2761,then the middle number isA. 249B. 259C. 359D. 349 7. The average of a and b is 40,if c=10 then what is the average of three numbers?A. 40B. 15C. 30D. 50 8. If a number is B,the average of the two numbers is A,then the other number is A. 2A-2BB. A-BC. 2A-BD. B-A 9. The average of squares of first 7 integers isA. 20B. 30C. 10D. 15 10. The mean of first 5 prime numbers isA. 3.6B. 4.6C. 5.6D. 7.6 11. The average of 55 consecutive odd numbers is A. 45B. 55C. 65D. 3 12. What is the average of x and y ,if 12x+3y=1 and 7y-2x=9?A. 3B. 1.8C. 1.5D. 0.5 13. The average of 20 numbers is 0.Of them at most how many can be greater than zero?A. 1B. 10C. 19D. 0 14. The weight of 5 boxes are 50,60,65,62,67,70,64,45 and 48 gm.what is the average? A. 49 gmB. 59 gmC. 39 gmD. 50 gm 15. The average of 25 results is 18,that of first 12 is14 and that of last 12 is 17.The 13th result is A. 78B. 58C. 75D. 65 Related posts: Averages Quiz 1 Averages Quiz 2 Averages Quiz 3

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