Homework Help: math

Posted by Jenny on Wednesday, August 29, 2012 at 11:32am.

At first one third of the class were boys. Then another boy joined the class. Now three out of eight of the class are boys how many students are in the class now? (Hint:There are fewer than 40 students in the class.)

math - Steve, Wednesday, August 29, 2012 at 11:45am
b = c/3
b+1 = 3/8 (c+1)

b=5
c=15

check:
at first, there were 5 boys in a class of 15
6 boys is 3/8 of 16

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