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Springfield Middle School has 600 students in total, 200 in each class

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Springfield Middle School has 600 students in total, 200 in each class [#permalink] New post   07 Dec 2023, 11:01
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Data Insights (DI) Butler 2023-24 [Question #146, Date: Dec-07-2023] [Click here for Details]




Springfield Middle School has 600 students in total, 200 in each class. The graph shows the percentage of students in each grade who do or do not read on grade level.

Based on the given information, fill in the blanks in each of the following statements.

The total number of 7th-grade students who do not read on grade level is .

If a Springfield middle school student is selected at random, there is a probability that he or she reads on grade level.

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Dropdown 1: 142 Dropdown 2: 0.28
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Re: Springfield Middle School has 600 students in total, 200 in each class [#permalink] New post   09 Dec 2023, 05:24
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The total number of 7th-grade students who do not read on grade level is 43%+28% = 0.71*200 = 142

If a Springfield middle school student is selected at random, there is a 0.28 probability that he or she reads on grade level.

Probability = Favorable options/Total options

Total options = 600
Favorable options = 0.24*200+0.29*200+0.32*200 = 48+58+64 = 170

Probability = 170/600 = 0.28
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Re: Springfield Middle School has 600 students in total, 200 in each class [#permalink] New post   09 Dec 2023, 10:57
1. The total number of 7th-grade students who do not read on grade level is (100 - 29)/100*200 = 71*2 => 142

2. If a Springfield middle school student is selected at random, there is a ________ probability that he or she reads on grade level.

24*2+29*2+32*2/600 = 0.2833
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Re: Springfield Middle School has 600 students in total, 200 in each class [#permalink] New post   18 Apr 2024, 20:49
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­The total number of 7th-grade students who do not read on grade level is [142].

Number of 7th-grade students who read on grade level: 200 * 29% = 58

Number of 7th-grade students who do not read on grade level: 200 - 58 = 142


If a Springfield middle school student is selected at random, there is a [0.28] probability that he or she reads on grade level.

Same number of students in each class
=> % students reading on grade level = \(\frac{24 + 29 + 32 }{ 300} = \frac{85}{300} = 0.28\)


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Re: Springfield Middle School has 600 students in total, 200 in each class [#permalink]
18 Apr 2024, 20:49
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