Question

What should be the value of the fourth column?

Answer 1

simultaneous equations W+2B+G=31, W+B+2G=29, B+3G=34 From the first two B-G=2 and from this and the third equation G=8 and B=10. Substitute these two values of G and B into first or second, W=3. So the answer for B+2W+G=10+6+8=24