Question
Average marks scored by Vineet in five subjects are 75.
The average marks scored by him (excluding his highest and lowest marks) are 60 and lowest marks scored by him are 55. Find the highest marks scored by him.Solution
Sum of marks scored by him in five subjects = 5 x 75 = 375 Sum of marks scored by him (excluding his highest and lowest marks) = 3 x 60 = 180 Therefore, sum of highest and lowest marks = 375 – 180 = 195 So, highest marks scored by him = 195 – 55 = 140
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Element involved in nitrogen fixation
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Which of the following element/substance leads to deflocculation of soil particles?
Microbe involved in biological oxidation of ammonium ion to nitrite ion is
Bray-1 test is used to determine phosphorous in
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The element which becomes deficit in acidic conditions ___
…………………………means the crop producing capacity of a soil which is measured in terms of yield (bio-mass).
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