Simplify (3 10÷3 7)×3 -3
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Answer:
Correct option is
D
60 kg
Given:-
Average weight of 3 persons =65kg
⇒
3
Total weight of 3 persons
=65
⇒Total weight of 3 persons=65×3
⇒Total weight of 3 persons=195
∵ fourth person having a weight of 45 kg joins the group.
∴ Total weight of 4 persons = Total weight of 3 persons + weight of fourth person
∴ Total weight of 4 persons = 195+45=240
⇒Average weight of group=
4
Total weight of 4 persons
=
4
240
=60kg
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