Copper consists of two isotopes A and B, whose atomic masses are 62.93 amu and 64.93 amu respectively. The atomic mass of copper is 63.55 amu. Calculate the percentage of the isotopes A and B.

Copper consists of two isotopes A and B, whose atomic masses are 62.93

1.	Copper consists of two isotopes A and B, whose atomic masses are 62.93 amu and 64.93 amu respectively. The atomic mass of copper is 63.55 amu. Calculate the percentage of the isotopes A and B.
A.	A (51%) & B (49 %)
B.	A (60%) & B (40 %)
C.	A (69%) & B (31%)
D.	A (1%) & B (99 %)
Answer» D. A (1%) & B (99 %)