Question

What are the average marks obtained by all the seven students in physics? (rounded off to two digit after decimal)

a. 77.26

b. 89.14

c. 91.37

d. 96.11?

Answer 1

Answer:

option no b 89.14

Explanation:

Average marks obtained in Physics by all the seven students

=

7

1

×[90% of 120)+(80% of 120)+(70% of 120)+(80% of 120)+(85% of 120)+(65% of 120)+(50% of 120)]

=

7

1

×[90+80+70+80+85+65+50)% of 120]

=

7

1

×(520% of 120]

=

7

624

=89.14.

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