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The average weight of a group of eight p...

The average weight of a group of eight people increased by 2.5 kg when a person weighing 80 kg joined in place of one of the members of the group. The weight of the member replaced was:
आठ लोगों के एक समूह का औसत वज़न 2.5 किलो ग्राम से बढ़ गया जब 80 किलो ग्राम का एक व्यक्ति समूह के किसी एक सदस्य के स्थान पर शामिल हो गया | इस समूह से बाहर गए व्यक्ति का वज़न ज्ञात करें |

A

1-60 kg

B

2-77.5 kg

C

3-70 kg

D

4-62.5 kg

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