Question

THE AVERAGE MARKS OF 40 MEMBER CLASS IN THE EXAMS IS 65.THE HIGHEST MARK EXCEEDS THE LOWEST BY 120 MARKS .IF THESE TWO MARKS ARE EXCLUDED ,THE AVERAGE OF THE REMAINING MARK REDUCE BY 1.FIND THE LOWEST MARK.

Answer 1

Answer:

40 members : AVERAGE =65

TOTAL=2600

HIGHEST-LOWEST =120

H=120+L

38 members: AVERAGE =64

TOTAL=2432

DIFFERENCE =2600-2432

=168

=>H+L=168

(120+L)+L=168

120+2L=168

2L=168-120

2L =48

therefore, LOWEST MARKS=24

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