Question

Ratio Question PLEASEE HELPL
Frank, Mary and Seth shared some sweets in the ratio 4:5:7. Seth got 18 more than Frank. Work out the number of sellers they shared

Answer 1

f:m:s=4:5:7

s=f+18 and from above we see s/f=7/4 so s=7f/4 now we can say:

f+18=7f/4

4f+72=7f

3f=72

f=24 and we know s=f+18 so

s=42

m/s=5/7 so m=42*5/7=30

So Frank got 24, Mary got 30, and Seth got 42.