SBI PO Prelims Written Test Qs.(Quantitative Aptitude) :: Profit and Loss - Discussion

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Explanation:
let 6 article be purchased for Rs 100.
.'. each article worth Rs.100/6.
so for 7 article it would be 100+100/6.
Discount% is equal to what % of (100+100/6) equal to 100,minus by 100%.
i.e.100=x of (100+100/6),
100=x% of 350/3.
x%=300/350.
x%=0.85714.
discount=(1-0.85714)*100.
=14.28% is the disount percentage on 116.6666.