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 and options
A teacher has partial data of the student result:
The other information available is:
1. Half the students have grade A or B
2. of the students are girls
3. th of boys have grade C
Number of boys who have grade B and the number of boys who have grade C are:
| 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. of the students are girls
3. th of boys have grade C
Number of boys who have grade B and the number of boys who have grade C are:
- 25, 10
- 10, 25
- 10, 30
- 30, 10
Answer and explanation
Correct answer: A - 25, 10
Boys = 40; grade C boys = 40/4 = 10; boys B = 40-5-10 = 25. Answer 25, 10.
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