Question 1022533
This is a weighted average problem...we set it up like this...
(12+21)(2.96) = 12(2.40) + 21x
where x is the GPA of the girls...
33(2.96) = 28.8 + 21x
97.68 = 28.8 + 21x
68.88 = 21x
x = 68.88/21 = 3.28 (the girls' GPA)