A quantity x is defined as x = 
. Value of a, b, c and d are reported as a = 3 ± 0.001, b = 5 ± 0.0013, c = 6 ± 0.24 and d = 10 ± 0.4. Percentage error in x will be –
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4
Sol. % error in x = x error in (a 3 – b 2 ) + 
% error in (c d)
% error in (a 3 – b 2 ) = 
× 100
% error in (c + d) = 
× 100
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