state gov BPSC LDC Mock Test 2021 Quantitative Aptitude Average

The average weight first 9 students in a row is 30 kg and the average weight of last 11 students in a row is 28kg. Find the approx average weight of 20 students in a row.

1
27.9 kg
2
29.9 kg
3
28.9 kg
4
30.9 kg
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