3. In Dewey Elementary School, there are two
second-grade classes: class A has 35 students
and class B has 45 students. If 40% of the
students in class A walk to school, and 80%
of the students in class B walk to school, what
percent of all the students in the second grade
at Dewey Elementary walk to school?
A) 40%
B) 42.5%
C) 60%
D) 62.5%

D) 62.5%

Explanation:

40% of A walk:

40% of 35 = 35(0.4) = 14

80% of B walk:

80% of 45 = 45(0.8) = 36

Total students that walk: 50

Total students: 35+45 = 80

Therefore total percentage of walkers: 50/80 = 62.5%

new york state wildlife expert richard thomas found that a woodchuck could (and does) chuck around 35 cubic feet of dirt in the course of digging a burrow. thomas reasoned that if a woodchuck could chuck wood, he would chuck an amount equivalent to the weight of the dirt, or 700 pounds.