Question

Plz help!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

What is the atomic weight of a hypothetical element consisting of two isotopes, one with mass = 64.23 amu (26.0%), and one with mass = 65.32 amu?
(a) 65.3 amu
(b) 64.4 amu
(c) 64.9 amu
(d) 65.0 amu
(e) 64.8 amu

Answer 1

I think it should be A or D.