A/2=b/3
b/a
a=2/3b
b=3/2a
4b/9a
The mean is the average, which is the sum of all the numbers divided by the total numbers there are. I will add them up for you, and then work from there.
184 + 192 + 164 + 200 = 740.
There is 740cm total, but now we need to divide by how many students we have. We have 4 students total.
740/4 = 185.
Your average (mean) height of the students is 185cm.
I hope this helps!
/If you solve for x you will get -7/2.
If it was one year it would be 2200 and you just keep adding 200 for each year.