SOLUTION: If in a class of 80 students, 60% are boys, 40% have first class degree & 50% boys have first class degree, what will be the numkber of girls having first class degree ?

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Question 921992: If in a class of 80 students, 60% are boys, 40% have first class degree & 50% boys have first class degree, what will be the numkber of girls having first class degree ?
Found 2 solutions by CubeyThePenguin, ewatrrr:
Answer by CubeyThePenguin(3113) About Me  (Show Source):
You can put this solution on YOUR website!
60% boys
40% girls

40% first-class degree
60% without

30% boys with first class degree
30% boys without

.....10% girls with first class degree
30% without

Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!

80 Students: 48 B and 32 G
Total Degrees: 32
Boys/degree (50%) = 24
Girls/degree = 32 - 24 = 8