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18 January, 17:22

in a class of 40 students, 3/4 are boys. 2/5 of the girls wear spectacles. how many girls do not wear spectacles?

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  1. 18 January, 17:44
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    Answer: 6 girls do not wear spectacles.

    Explanation: 3/4 of 40 students are boys = > 3/4 x 40 = 30. Therefore, there are 30 boys in the class.

    Number of girls = 40 - 30 = 10

    2/5 of 10 girls wear spectacles = > 2/5 x 10 = 4

    Therefore number of girls that do not wear spectacles is 10 - 4 = 6girls
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