Question

X Х
The mass of Mr x is 50kg and the uncertainty in
measurement is 1 kg.The mass of Mr y is 55kg
and the uncertainty in measurement is 2 kg.
Find the difference of their masses with correct
uncertainties.
a. 105 + 3 kg
b. 51 kg
c. 5 + 3 kg
d. None of these​

Answer 1

Answer should be 5(+-)3

You can refer to option C.