Wrong answer

It seems that the true answer is 1/2 of choice a) (so none of the above). I explained how the answer is = 1/2 of option a) then stated that a) is the final answer.

BRIANCHAN (talk)09:23, 10 March 2018

Thanks a lot Brian!

HyunjuKwon (talk)18:53, 10 March 2018