Of 248 adults who tried a new multigrain cereal Wow 158 rate

Of 248 adults who tried a new multi-grain cereal, \"Wow!\", 158 rated it excellent; of 97 children sampled, 89 rated it excellent. What is the pooled proportion?

Solution

pooled proportion = (x1+x2)/(n1+n2) = (158+89)/(248+97) = 247/345 = 0.716 (answer)