Of the first graders who were asked,1/6 like math best,2/3 like reading best, and 12 like science best.How many first graders were asked their favorite subject?

Answer 1

1/6 + 2/3 = 1/6 + 4/6 = 5/6

Those who like science make up 1/6 of the class.

6 * 12 = 72