Cyotsine and Guanine are equal.
Thymine and Adenine are equal.
If thymine is 20% so is adenine. That takes up 40% of the DNA bases. The
remaining 60% is divided equally amungst guanine and cyotsine. So each
is 30%
30% of 1000 is simply 300. yun lang... hehehe ^_^