Quiz Discussion

The average weight of A, B and C is 40 kgs. Weight of C is 24 kgs more than A’s weight and 3 kgs less than B’s weight. What will be the average weight of A, B, C and D, if D weights 15 kgs less than C?

Course Name: SQL -Structured Query Language

  • 1] 42 kgs
  • 2] 40 kgs
  • 3] 36 kgs
  • 4] 38 kgs
Solution
No Solution Present Yet

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A library has an average of 510 visitors on Sundays and 240 on other days. The average number of visitors per day in a month of 30 days beginning with a Sunday is

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A batsman makes a score of 87 runs in the 17th inning and thus increases his average by 3. Find his average after 17th inning.

  • 1] 40
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  • 3] 52
  • 4] 55
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The average age of an adult class is 40 years. 12 new students with an average age of 32 years join the class, thereby decreasing the average by 4 years. The original strength of the class was-

  • 1] 10
  • 2] 11
  • 3] 12
  • 4] 15
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The average weight of 3 men, A, B and C is 84 kg. Another man D joins the group and the average now becomes 80 kg. If another man E whose weight is 3 kg more than that of D, replaces A then the average weight of B, C, D and E becomes 79 kg. What is the weight of A ?

  • 1] 70 kg
  • 2] 72 kg
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Find the average of 205, 302, 108, 403, and 202-

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A cricketer had a certain average of runs for his 64 innings. In his 65th innings, he is bowled out for no score on his part. This brings down his average by 2 runs. His new average of runs is :

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The average of x number is y and average of y numbers is x. Then the average of all the numbers taken together is

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    (x+y)/2xy

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The average marks of four subjects is 120. If 33 was misread as 13 during the calculation, what will be the correct average?

 

  • 1] 122
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  • 3] 125
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The average of six number is x and the average of three of these is y. the average of the remaining three is z, then 

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    x=y+z

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    2x=y+z

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    x=2y+2z

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