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If the average weight of 6 students is 50 kg. If two student of average weight of 51 kg are added and two other students of average weight of 55 kg are also added then the average weight of all the students is :
Answer & Solution
Correct Answer:
Option
D
According to the question,
Required Average
$$\eqalign{ & = \frac{{6 \times 50 + 51 \times 2 + 55 \times 2}}{{10}} \cr & = \frac{{300 + 212}}{{10}} \cr & = \frac{{512}}{{10}} \cr & = 51.2{\text{ Kg}} \cr} $$
Required Average
$$\eqalign{ & = \frac{{6 \times 50 + 51 \times 2 + 55 \times 2}}{{10}} \cr & = \frac{{300 + 212}}{{10}} \cr & = \frac{{512}}{{10}} \cr & = 51.2{\text{ Kg}} \cr} $$
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