Per cent oxygen in the exhaled air is (a) 0 (b) 6 (c) 12 (d) 16

Per cent oxygen in the exhaled air is (a) 0 (b) 6 (c) 12 (d) 16
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Description : What is the concentration of oxygen in air exhaled?

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Express `6/25` as per cent.

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The excise duty on a certain item has been reduced to Rs 760 from Rs 950. Find the reduction per cent in the excise duy on that item. -Maths

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The country whose 40 per cent of area is below sea level at high tide is: (1) Denmark (2) Norway (3) Finland (4) The Netherlands

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