In an experiment, four quantities a, b, c and d are measured with percentage error 1%, 2%, 3% and 4%, respectively. Quantity P is calculated as follows P=a3b2cd%,error in P is   [NEET 2013]

Here,  P=a3b2cd∴ΔPP×100=3Δaa+2Δbb+Δcc+Δdd×100                      =3Δaa×100+2Δbb×100+Δcc×100+Δdd×100                      = 3 x 1% + 2 x 2% + 3% + 4%                      = 3% + 4% + 3% + 4% = 14%