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LenKa [72]
3 years ago
15

Your math test has 38 questions and is worth 200 points. This test consists of multiple-choice questions worth 4 points each and

open-ended questions worth 20 points each. How many of each type of question are there?
Mathematics
1 answer:
Furkat [3]3 years ago
8 0

Answer: the number of multiple-choice questions in the math test is 35 and the number of open-ended questions in the math test is 3

Step-by-step explanation:

Let x represent the number of multiple-choice questions in the math test.

Let y represent the number of open-ended questions in the math test.

The math test has 38 questions. It means that

x + y = 38

This test consists of multiple-choice questions worth 4 points each and open-ended questions worth 20 points each. The total number of points is 200. It means that

4x + 20y = 200 - - - - - - - - - -1

Substituting x = 38 - y into equation 1, it becomes

4(38 - y) + 20y = 200

152 - 4y + 20y = 200

- 4y + 20y = 200 - 152

16y = 48

48/16

y = 3

Substituting y = 3 into x = 38 - y, it becomes

x = 38 - 3 = 35

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Question a)

We have
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The table is attached in picture 1 below

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Question b)

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Question c)

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P(-0.77<z<2.27) = 0.9884 - 0.2206 = 0.7678 = 76.78%


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