Question

For a craft, each student will need five rubber bands. There are eight students. What rubber bands come in bags of 9. How many bags will be needed? How many rubber bands will be left over?

Answer 1

Answer:

In total 5 packets of rubber bands are needed.

Out of which 5 rubber bands are left.

Step-by-step explanation:

The number of rubber bands needed by 1 student  = 5

The total number of students  = 8

So, the total rubber bands needed by all students

=  Total students   x Number of rubber bands needed by 1 student

= 8 x 5  = 40 bands

Now 1 packet of rubber bands  = 9 bands

⇒ 2 packets  = 2 x ( 9 bands) = 18  bands

⇒ 3 packets  = 3 x ( 9 bands) = 27  bands

Similarly, 4 packets  = 36 bands , 5 packets  = 45 bands

Now, if we buy 4 packet of bands, there are 36 rubber bands which are LESS THAN THE TOTAL STUDENTS.

So, we buy 5 packets.

We have in total  45 bands, but the total students = 40

So, the number of  left rubber bands = Total bands - Total students

                                                               = 45 - 40 = 5

Hence, in total 5 packets of rubber bands are needed, and out of which 5 rubber bands are left.