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this is inclusive series.. first mak it exclusive.. it will b lyk this
10.5-20.5=5 20.5-30.5=10 30.5-40.5=13 40.5-50.5=4 50.5-60.5=2 60.5-70.5=1 formula for calcutaing exclusive series is... upper limit of last class interval(say 20) subtracted from lower limit of nxt clas(say 21).. divided by 2 equation will b lyk this 21-20/2 answer will b 0.5... nw reduce this 0.5 in evry class interval's lower limit.. n add 0.5 in evry class intrval's upper limit |
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