Math, asked by shrimathishetty881, 7 months ago

Mean of 100 item is 49 if three items 60,70,80 are wrongly noted as 40,20,50 respectively find the correct mean

Answers

Answered by jagadishgouda786

4

Answer:

Sum of 100 items =49×100=4900

Sum of items added =60+70+80=210

Sum of items replaced =40+20+50=110

New sum =4900−110+210=5000

∴ new mean

100

5000

=50

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