An experiment measures quantities a,b and c, and X is

calculated from

if the percentage error in a,b,c are ±1%, ±5%, ±2% respectively, the percentage error in X will be

a) 7%

b) 5%

c) 1%

d) 9%

Answer:

Percentage error = 1x percentage error in a + 2 x percentage error in b + 3 x percentage error in c

= 1×1 +2×5+3×2

=1+10+6

= 17%

SO there could be a misprint in the question posted by you.

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