a=40+/-2 , b=20+/-2 and c=1.0+/-0.1
X=3b-2c
my working:
X = 3b-2c
so X=3(20)-2(1.0)
=58.0
and deltaX=3XdeltaB+2deltaC
=3(2.0)+2(.0.1)
=6.2
=6.0
so answer is (58+/- 6)
why is this wrong
when and why do you apply (Xmax - Xmin)which makes X=64.4-51.8=4.4?
i tink la
deltaXsquared=3squaredXdeltaBsquared + 2squaredXdeltaCsquared
but i cannot confirm if the 3 and 2 must be squared.