Can you help me with number 4 pleaseeeeeee

Can You Help Me With Number 4 Pleaseeeeeee class=

Answer :

Answer:

r=15-8 r=7

Step-by-step explanation:

You know for sure that there are 15 sandbags. You know that 8 of those sandbags are blue. If 8/15 are blue, then the other 7 must be red.