120 average question with trick solution(part 1)

This article provide you complete guide on average topic.In this article we have provided you  8 questions on Average  topic with shortcut trick. By studying all 120  question on this blog you can become master on average topic.

1)Average age of 15 students of a class is 18 years. when the teacher joins this group average increases by 2 yr. what is the teachers age.
[solved under equal distribution method]

2) The average age of  A,B and C is 24 year. If  the average age of A and C is 27years,what is the age of B ?

[solved under equal distribution method]

3)The average of 9 number is 60. If the average of 1st 8of these number is 59,the 9th number is ?

 

[solved under equal distribution method]

4)The average age of 35 students in a class is 12 yr. if the age of teacher is also included ,the average age is increased by 1½  yr. Find the age of teacher?

[solved under equal distribution method]

 5)The average age of 15 girls and their teacher’s age is 16.If the teachers age is excluded then the average reduced by 1. what  is teachers age?

  

[solved under equal distribution method]

  6)A cricketer has a mean score of 68 runs in 11 innings ,find out how many runs are to be scored in the  12th innings to raise the mean to 71.

[solved under equal distribution method]

    7)The average of 15 number is 8 .what will be the new average if each of the number is multiplied by 6?

           

      

8)The average weight of 39 students in a class is 23 among them suma is the heaviest while uma is the lightest. If both of them are excluded from the class still the average remains same .The the weight of  ratio of weight of suma and uma is 15:8.Then what is the weight of uma




 





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