If \overline{X_{1}}=50 \overline{X_{2}}=40,\sigma_{1}=5,\sigma_{2}=6,n_{1}=100 and n_2=150 then find combined S.D of 250 items.

CA CPT Dec 2018 Question Paper Quantitative Aptitude for online practice

Question : 36 of 50

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\ov{X_{1}}=50

\ov{X_{2}}=40,σ_{1}=5,σ_{2}=6,n_{1}=100

and

n_2=150

then find combined S.D of 250 items.

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