a class of 80 is 25% girls.if 10% of the boys and 20% of the girls attended a picnic, what percent of the class attended?
25% of 80 is 20
so, there are 20 girls and 60 boys
10% of the boys is 6
20% of the girls is 4
so, I guess you can figure out how many attended . . .
To find out what percent of the class attended the picnic, we need to calculate the number of boys and girls who attended separately and then calculate the total percentage.
Step 1: Calculate the number of girls in the class:
If the class has 80 students, and 25% of them are girls, then the number of girls is:
80 students * 25% = 80 * 0.25 = 20 girls
Step 2: Calculate the number of boys in the class:
The total number of students in the class is 80, and we know that 20 of them are girls. Therefore, the number of boys in the class is:
Total number of students - Number of girls = 80 - 20 = 60 boys
Step 3: Calculate the number of boys and girls who attended the picnic:
10% of the boys attended the picnic, which means that the number of boys who attended the picnic is:
10% of 60 boys = 60 * 0.10 = 6 boys
20% of the girls attended the picnic, so the number of girls who attended the picnic is:
20% of 20 girls = 20 * 0.20 = 4 girls
Step 4: Calculate the total number of students who attended the picnic:
The total number of students who attended the picnic is:
Number of boys who attended the picnic + Number of girls who attended the picnic = 6 boys + 4 girls = 10 students
Step 5: Calculate the percentage of students who attended the picnic:
To find the percentage, we divide the number of students who attended the picnic by the total number of students in the class and multiply by 100:
(10 students / 80 students) * 100 = 0.125 * 100 = 12.5%
Therefore, 12.5% of the class attended the picnic.
To find the percentage of the class that attended the picnic, we first need to calculate the number of boys and girls in the class.
Given that the class has 80 students and 25% are girls, we can calculate the number of girls as follows:
Number of girls = 25/100 x 80 = 20
Now, we can find the number of boys in the class by subtracting the number of girls from the total number of students:
Number of boys = Total number of students - Number of girls = 80 - 20 = 60
Next, we need to calculate the number of boys who attended the picnic, which is 10% of the total number of boys:
Number of boys attending picnic = 10/100 x 60 = 6
Similarly, we can find the number of girls who attended the picnic, which is 20% of the total number of girls:
Number of girls attending picnic = 20/100 x 20 = 4
Now, we can calculate the total number of students attending the picnic by adding the number of boys and girls who attended:
Total number of students attending picnic = Number of boys attending picnic + Number of girls attending picnic = 6 + 4 = 10
Finally, to find the percentage of the class that attended the picnic, we divide the total number of students attending by the total number of students and multiply by 100:
Percentage of the class attending picnic = (Total number of students attending picnic / Total number of students) x 100
Percentage of the class attending picnic = (10 / 80) x 100 = 12.5%
Therefore, 12.5% of the class attended the picnic.