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The question asks for the cumulative frequency of values greater than 64.5. This requires finding the cumulative frequency starting from the class that contains values greater than 64.5 and then summing the frequencies of those classes.

Let's break down the solution:

### Step 1: Identify the classes and frequencies

- **50 – 54:** Frequency = 4
- **55 – 59:** Frequency = 9
- **60 – 64:** Frequency = 8
- **65 – 69:** Frequency = 12
- **70 – 74:** Frequency = 5
- **75 – 79:** Frequency = 2

### Step 2: Determine which class contains 64.5
The class **60 – 64** ends at 64, while the class **65 – 69** starts at 65. Thus, the values greater than 64.5 fall into the class **65 – 69** and all higher classes.

### Step 3: Calculate cumulative frequency for values greater than 64.5
We sum the frequencies of the classes starting from **65 – 69** upwards:
- Frequency of **65 – 69** = 12
- Frequency of **70 – 74** = 5
- Frequency of **75 – 79** = 2

### Step 4: Total cumulative frequency
Cumulative frequency \( F_k \geq 64.5 = 12 + 5 + 2 = 19 \).

### Answer:
The cumulative frequency of values greater than 64.5 is **19**.

Thus, the correct answer is **C. 19**.

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Would you like further details or clarifications? Here are some related questions:

1. What is cumulative frequency, and how does it differ from simple frequency?
2. Can you explain how to determine class intervals from data?
3. How do we calculate cumulative frequency for values less than a certain point?
4. How is a cumulative frequency distribution table created?
5. What are the advantages of using cumulative frequency in data analysis?

**Tip:** Always ensure the class boundaries (like 64.5) are interpreted correctly when working with cumulative frequency.

Frekuensi kumulatif yang nilainya lebih dari 64,5 adalah?

Find out how to calculate the cumulative frequency of values greater than 64.5 from a frequency distribution table. This problem covers class intervals, frequency summation, and data analysis for students in Grades 9-11.

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