Mrs. Lamar has a class of 16 students

Question

Mrs. Lamar has a class of 16 students. She can spend $24 on each student to buy math supplies. She first buys her students calculators which cost a total of $99.20. After buying the calculators, how much does she have to spend on each student?

Answer 1

This is an alternative way to solve the problem.

She already spent $99.20 on calculators. Since there are 16 students, then it means she spent an average of

$99.20 /16 = $6.20 on each student. Therefore, the amount of remaining  money that she can spend on each student is $24 - $6.20 = $17.80

 

 

Answer 2

First, we need to find the total amount she can spend. To do this we multiply the number of students by the amount she can spend on each student. This is 16 * 24 = 384. Since she spent a total on 99.20 on calculators, we subtract this from the total. So, 384 - 99.20 =  284.80. To find out how much she has to spend per student after buying the calculators, we divide the total left by the number of students. Therefore 284.80 / 16 = 17.80 per student.