Question

if 1/4 of the people in a water aerobics class are over age 65 and 1/4 of the people in the class are under age 40 what fraction of the people in the class are either over 65 or onder 40?

Answer 1

1/2

1/4 over age 65
1/4 under age 40

1/4 + 1/4 = 2/4 or 1/2

1/2 of the people are over 65 and under 40. The remainder is 1/2 is between 40 and 65