Answers

2016-01-19T17:54:04+05:30
For frequency put B value. u will get the frequency. I m unable to upload pic. but the B value is 5. put the formula 50=sum of xy/ sum of y 50=640b+2800/12b+60 600b+3000=640b+2800 40b=200 b=200/40=5
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