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%
Answers
Answer 1
Answer:
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%