The annual tuition at a public two-year college last year was $3,200. For the new school year, Elizabeth's first year in college,
the tuition is expected to increase 5%. She saved the same amount monthly to prepare for the cost of her tuition. What is the
minimum amount Elizabeth should have saved monthly during the previous year?
$267
$280
$308
$400

The answer is 280.

Step-by-step explanation:

I=Prt = 3200(5%)(1) = 3360                                                                                                    

280 X 12 = 3360

36 girls

step-by-step explanation:

the 48 boys is 4 parts of the ratio

divide 48 by 4 to obtain one part of the ratio

= 12 ← 1 part of the ratio

3 parts = 3 × 12 = 36 ← number of girls