the table given below shows type of interest
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Score No.ofstudents Score cf 200−250 30 More than 200 200 250−300
15 than 250 170 300−350 45 More than 300 155 350−400 20 More than 350 110 400−45025 More than 400 90 450−50040 More than 450 65 500−55010 More than 500 25 550−60015 More than 550 15⇒ The coordinates for curves are (200,200),(250,170),(300,155),(350,110),(400,90),(450,65),(500,25),(550,15)
⇒ Here, N=200. So, 2N=100
Draw LM⊥OX
We get M=375
∴ Median=375
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