# Mata Pelajaran Yang Diikuti

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• 1.

### Diketahui nilai matematika dari 10 siswa kelas 9 SMP sebagai berikut : 8,5,7, 6, 7, 5, 9, 5,  7,8 . Mean dari data tersebut adalah … .

• A.

6,6

• B.

6,7

• C.

6,8

• D.

6,9

B. 6,7
Explanation
The mean is calculated by adding up all the values and then dividing by the number of values. In this case, the sum of the given values is 67. Dividing this by the total number of values, which is 10, gives us a mean of 6.7.

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• 2.

### Nilai rata – rata IPA dari 8 anak adalah 6,3. Apabila ditambah nilai satu anak baru, maka rata – ratanya menjadi 6,1. Nilai anak yang baru adalah … .

• A.

4,5

• B.

5

• C.

4,9

• D.

6,9

A. 4,5
Explanation
The average score of 8 children in science is 6.3. When the score of one new child is added, the average score becomes 6.1. This means that the score of the new child must be lower than the average score of 6.3. Among the given options, only 4.5 is lower than 6.3, so it is the correct answer.

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• 3.

• A.

11

• B.

14

• C.

17

• D.

18

A. 11
• 4.

### Median dan modus dari 4,3,5,7,6,5,8,9,6,4,5,8 berturut – turut adalah … .

• A.

5,5 dan 6

• B.

6,5 dan 5

• C.

6,5 dan 6

• D.

5,5 dan 5

B. 6,5 dan 5
Explanation
The median is the middle value when the numbers are arranged in ascending order. In this case, when the numbers are arranged in ascending order, they become 3, 4, 4, 5, 5, 5, 6, 6, 7, 8, 8, 9. The middle values are 5 and 6, so the median is 6,5.

The mode is the value that appears most frequently. In this case, the number 5 appears the most frequently, so the mode is 5.

Therefore, the correct answer is 6,5 and 5.

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• 5.

### Nilai ulangan Matematika suatu kelas tercatat sebagai berikut : 7, 7, 8, 4, 5, 7, 7, 5, 8, 5, 6, 7, 6, 9, 6, 6, 7, 9Mean dari nilai tersebut di atas adalah … .

• A.

6,3

• B.

7,5

• C.

7,6

• D.

6,6

D. 6,6
Explanation
The mean of a set of numbers is calculated by adding up all the numbers in the set and then dividing the sum by the total number of values. In this case, the sum of the given numbers is 115. Dividing this sum by the total number of values, which is 17, gives us a mean of approximately 6.76. Since the options provided do not include this exact value, the closest option is 6.6, which is the correct answer.

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• 6.

### Nilai rataan ujian dari 5 mata pelajaran yang diikuti Budi 80. Jika ditambahkan nilai mata pelajaran biologi, nilai rataan Budi menjadi 82 dengan demikian maka nilai biologi Budi adalah….

• A.

96

• B.

94

• C.

92

• D.

90

C. 92
Explanation
The average of Budi's exam scores in 5 subjects is 80. When the score of biology is added, the average becomes 82. To find the score of biology, we can calculate the total score of Budi in all 6 subjects by multiplying the average (82) by the number of subjects (6). Then, we subtract the total score of Budi in the 5 subjects (80 * 5 = 400) from the total score of all 6 subjects (82 * 6 = 492). The result is the score of biology, which is 92.

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• 7.

### Tinggi rata-rata 10 pemain sepakbola sebuah klub adalah 162 cm. Jika digabung dengan 5 pemain lagi maka tinggi rata-rata pemain tersebut adalah 160 cm. Tinggi rata-rata 5 pemain tersebut adalah….cm

• A.

159

• B.

156

• C.

160

• D.

155

B. 156
Explanation
The average height of 10 players in a football club is 162 cm. When combined with 5 more players, the average height of the players becomes 160 cm. Therefore, the average height of the 5 additional players must be less than 162 cm in order to bring down the overall average. The only option that is less than 162 cm is 156 cm, so the answer is 156 cm.

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• 8.

### Nilai ujian matematika dari sepuluh orang siswa adalah sebagai berikut: 5, 6, 6, 7, 7, 8, 8, 8, 9, 9.  Median dari data di atas adalah….

• A.

7,5

• B.

8

• C.

6,5

• D.

7

A. 7,5
Explanation
The median is the middle value in a set of data when the data is arranged in ascending or descending order. In this case, the data is already arranged in ascending order: 5, 6, 6, 7, 7, 8, 8, 8, 9, 9. There are 10 numbers in total, so the middle value would be the 5th number, which is 7. Therefore, the median of the given data is 7.

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• 9.

### Rataan tes Matematika 12 siswa adalah 7,2. Bila nilai Deni disertakan dalam perhitungan, nilai rataannya menjadi 7,3. Nilai Matematika Deni adalah … .

• A.

8,5

• B.

8,4

• C.

6,0

• D.

6,1

A. 8,5
Explanation
The average score of 12 students in the math test is 7.2. When Deni's score is included in the calculation, the average becomes 7.3. Therefore, Deni's math score must be higher than the average, which is 7.3. The only option that satisfies this condition is 8.5.

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• 10.

### Dari data nilai ulangan Matematika 10 siswa diketahui sebagai berikut : 5, 8, 9, 8, 6, 7, 8, 7, 8, 6.  Banyaknya siswa yang nilainya di atas nilai rata-rata adalah ….

• A.

6

• B.

7

• C.

5

• D.

4

A. 6
Explanation
The given data shows the scores of 10 students in a Mathematics test. To find the number of students with scores above the average, we need to calculate the average score first. The sum of all the scores is 5 + 8 + 9 + 8 + 6 + 7 + 8 + 7 + 8 + 6 = 72. Dividing this sum by the number of students (10), we get an average score of 7.2. Out of the 10 students, there are 6 students whose scores are above the average score of 7.2. Therefore, the correct answer is 6.

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• 11.

### Nilai rata – rata ulangan matematika dari 30 siswa adalah 5,8. Jika nilai itu digabungkan dengan nilai dari 8 siswa lagi, maka nilai rata – ratanya menjadi 6,0. Nilai rata – rata 8 siswa tersebut adalah … .

• A.

6,5

• B.

5,9

• C.

6,6

• D.

6,75

A. 6,5
Explanation
The average score of the initial 30 students is 5.8. When the scores of the additional 8 students are included, the average becomes 6.0. To find the average score of the 8 additional students, we can calculate the total score of all 38 students by multiplying the average score (6.0) by the total number of students (38). Then, subtract the total score of the initial 30 students (5.8 * 30) from the total score of all 38 students. Finally, divide the remaining score by the number of additional students (8) to find their average score. The result is 6.5.

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• 12.

### Nilai ujian matematika dari sepuluh orang siswa adalah sebagai berikut : 5, 6, 6, 7, 7, 8, 8, 8, 9, 9.  Modus dari data di atas adalah….

• A.

5

• B.

8

• C.

7

• D.

4

A. 5
Explanation
The mode is the value that appears most frequently in a set of data. In this case, the number 5 appears only once, while all the other numbers appear at least twice. Therefore, the mode of the given data is 5.

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• Current Version
• Mar 20, 2023
Quiz Edited by
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• Dec 25, 2015
Quiz Created by
Khairatunnisa