A potential difference of 1.1068 is produced in an electrolysis set-up with the two half cell elements of?

Question

Half Cell Reactions ``Standard Electrode Potentials (volts)
K <-> K+ + e- ````````````````+2.92
Ca <-> Ca++ + 2e- ``````````+2.87
Mg <-> Mg++ + 2e- `````````+2.34
Zn <-> Zn++ + 2e- ````````````.762
Cu <-> Cu++ + 2e- `````````-.344
Ag <-> Ag+ + e- `````````````-.7995
Pt <-> Pt++ + 2e- `````````````-1.2

The Choices:

A. Calcium and Silver
B. Copper and Zinc
C. Magnesium and Platinum
D. Potassium and Silver
E. Zinc and Silver

Please let me know why thats the answer.

Answer 1

B

Just add them up.