One-fourth of the students at a nursery school are 4 years old or older. If 15 students have not yet reached their third birthday, and a total of 40 students are not between 3 years old and 4 years old, how many children are in the nursery school?  Choose one: A) 80 B) 90 C) 100 D) 110 E) 120
x/4 students are &gt; 4 yrs   15 students are &lt; 3 yrs   x/4+ 15 = 40   x/4 = 25   x = 100   Answer: 100
<result>C</result>
One-fourth of the students at a nursery school are 4 years old or older. If 15 students have not yet reached their third birthday, and a total of 40 students are not between 3 years old and 4 years old, how many children are in the nursery school?