The teacher gives the following homework assignment: You have to write an essay by tomorrow. You may work alone or in boy-girl pairs. As it turned out, 2/3 of the boys and 3/5 of the girls worked in pairs. What fraction of the class worked alone?

3 and 5

lcm=15

3/5=9/15 2/3=10/15

9/15-10/15=1/15

I'm I doing the right thing