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
The number of girls, boys and total number of students is:
| 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
The number of girls, boys and total number of students is:
- Girls-40, Boys-45, Total-85
- Girls-40, Boys-40, Total-80
- Girls-40, Boys-50, Total-90
- Girls-40, Boys-35, Total-75
Answer and explanation
Correct answer: B - Girls-40, Boys-40, Total-80
Girls = 40 are 50% of students, so total = 80 and boys = 40. Every student is either a girl or a boy, so the boys are the remaining 80 - 40 = 40.
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