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QOTD#18 Of 60 students in a class 2/3 are girls, and 2/5 of
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08 Dec 2016, 05:13
08 Dec 2016, 05:13
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Question Stats:
79% (01:16) correct
20% (02:02) wrong based on 48 sessions
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Of 60 students in a class 2/3 are girls, and 2/5 of the class are taking music lessons. What is the maximum number of girls that are not taking music lessons?
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36
Re: QOTD#18 Of 60 students in a class 2/3 are girls, and 2/5 of
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08 Dec 2016, 05:18
08 Dec 2016, 05:18
2
Expert Reply
Explanation
If 2/3 of the class of 60 are girls (=40), 1/3 must be boys (=20)
2/5 of the class (=24) are taking music.
The maximum number of girls not taking music will be when all the boys take music.
If all 20 boys take music, then only 4 girls need to take it, so 36 girls do not take music lessons.
If 2/3 of the class of 60 are girls (=40), 1/3 must be boys (=20)
2/5 of the class (=24) are taking music.
The maximum number of girls not taking music will be when all the boys take music.
If all 20 boys take music, then only 4 girls need to take it, so 36 girls do not take music lessons.
QOTD#18 Of 60 students in a class 2/3 are girls, and 2/5 of
[#permalink]
27 Sep 2022, 01:33
27 Sep 2022, 01:33
Was expecting some twist in this PP2 Question. But Never mind.
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