One-sixth of the students at a nursery school are 5 years old or older. If 15 students have not yet reached their fourth birthday, and a total of 30 students are not between 4 years old and 5 years old, how many children are in the nursery school?  Choices:
A) 50  B) 55  C) 60  D) 65  E) 70
x/6 students are &gt; 5 yrs   15 students are &lt; 4 yrs   x/6+15 = 25   x/6 = 10   x = 60   Answer: 60
<result>C</result>
One-sixth of the students at a nursery school are 5 years old or older. If 15 students have not yet reached their fourth birthday, and a total of 30 students are not between 4 years old and 5 years old, how many children are in the nursery school?