Answer:
3 friends
Step-by-step explanation:
The mean age is 27 so 3 friends are above that age.
4n-8=3n+4
+8 +8
4n=3n+12
-3n -3n
n=12
4:2:3
16 blue marbles,8 green marbles and 12 red marbles.
Ratio of blue to green to red
blue:green:red
16:8:12
We can divide each term by 4
16/4:8/4:12/4
