A teacher has partial data of the student result: Sex Grade A Grade B Grade C Total Girls 40 Boys 5 Total 30 The other information available is: 1. Half the students have grade A or B 2. $50 \%$…

Question

A teacher has partial data of the student result:

Sex	Grade A	Grade B	Total
Girls			40
Boys	5
Total		30

The other information available is:
1. Half the students have grade A or B
2.

50 \%

of the students are girls
3.

\frac14

th of boys have grade C

The numbers of girls who have grade B and number of girls who have grade C are:

Accepted Answer

A - 5, 30. Girls = 40 = 50% so total = 80, boys = 40. Boys grade C = 40/4 = 10, boys A = 5 so boys B = 25. Total B = 30 so girls B = 5. A+B = half of 80 = 40, so total A = 10, girls A = 5, girls C = 40-5-5 = 30. Girls B, C = 5, 30.

Answer

B - 30, 5

Answer

C - 10, 30

Answer

D - 30, 10

A teacher has partial data of the student result: Sex Grade A Grade B Grade C Total Girls 40 Boys 5 Total 30 The other information available is: 1. Half the students have grade A or B 2. \(50 \%\)…

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