The test !
Number Theory
Level
1
In a test of statistics marks were awarded out of 40 . The average of 15 students was 38 .Later it was decided to give marks out of 50 . Then the new average of 15 students will now be
41.5
95
40
47.5
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1 solution
38/40 is equal to 47.5/50. We are multiplying 38 by 50/40 or 1.25.