Question

in a class of 20students the average mark of the first 19 students is 25 and the last 19 is 26. if the first boy get 16 marks find the marks of last boy

Answer 1

Answer:

Marks of last boy = 35

Step-by-step explanation:

Hi,

Given the average mark of last 19 students = 26

Sum of marks of all the last 19 students = 26*19 = 494

Given the first boy marks = 16

Thus, sum of marks of all 20 students = 494 + 16

= 510

Given the average mark of first 19 students = 25

Sum of marks of all the last 19 students = 25*19 = 475

Sum of marks of all 20 students = Sum of marks of first 19 students +

   Marks of last student

=> Marks of last boy = Sum of marks of all 20 students -

Sum of marks of first 19 students

= 510 - 475

= 35.

Hence, Marks of last boy are 35.

Hope, it helped !

Answer 2

Answer:

refer to the above attachment

Step-by-step explanation:

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