2/5 of the 40 students in class are girls. 1/4 of the girls wear glasses. How many girls do not wear glasses?
(1/4) * (2/5) * 40 = 80/20 = 4 girls wear glasses
(2/5) * 40 = 80/5 = 14 students are girls
14 girls
14 girls and 4 wear glasses
To find the number of girls who do not wear glasses, we first need to determine the total number of girls in the class.
We are given that 2/5 of the 40 students in the class are girls. To find the number of girls, we can calculate:
Number of girls = (2/5) * 40
Let's solve this equation:
Number of girls = (2/5) * 40
= (2 * 40) / 5
= 80 / 5
= 16
So, there are 16 girls in the class.
Next, we know that 1/4 of the girls wear glasses. To find the number of girls who wear glasses, we can calculate:
Number of girls who wear glasses = (1/4) * 16
Let's solve this equation:
Number of girls who wear glasses = (1/4) * 16
= (1 * 16) / 4
= 16 / 4
= 4
Therefore, there are 4 girls who wear glasses.
Finally, to find the number of girls who do not wear glasses, we subtract the number of girls who wear glasses from the total number of girls:
Number of girls who do not wear glasses = Total number of girls - Number of girls who wear glasses
= 16 - 4
= 12
Therefore, there are 12 girls who do not wear glasses.