in a test called acsat, the average marks of 15 test takers is 240. if the marks of 5 test takers are subtracted, the average marks decreases by 40. what is the average marks of 5 test takers?
Answers
Answered by
74
----------------------------------------
Here is the solution:
----------------------------------------
Find the total marks of all the 15 test takers:
Average = 240
Total = 240 x 15 = 3600
Find the total marks of the 10 test takers, excluding the 5 of them:
Average = 240 - 40 = 200
Total = 200 x 10 = 2000
Find the total of the 5 excluded test-takers:
Total of the 5 = 3600 - 2000 = 1600
Find the average of the 5 test-takers:
Average = 1600 ÷ 5 = 320 marks
Answer: The average mark of the 5 test takes is 320.
Answered by
3
Total marks for 15 students = 240 * 15 = 3600
Avg marks for 10 students = 240 - 40 =200
Total marks for 10 students = 200* 10 = 2000
Total marks for 5 students = 3600 - 2000 =1600
Avg = 1600/ 5 = 320
Similar questions