**Given Information:**

- Total number of students appeared in TY BCom examination = 16000
- Ratio of number of boys to girls = 3:5
- Number of passed students exceeds the number of failed students by 8000
- Number of girls failing in the examination = 2400

**To Find:**
- Coefficient of association between student and success

**Solution:**

**Step 1: Calculate the number of boys and girls**

Let the number of boys be 3x and the number of girls be 5x. According to the given ratio,

3x + 5x = 16000

8x = 16000

x = 2000

So, the number of boys = 3 * 2000 = 6000

And the number of girls = 5 * 2000 = 10000

**Step 2: Calculate the number of passed and failed students**

Let the number of passed students be P and the number of failed students be F. According to the given information,

P - F = 8000 ...(1)

Also, the total number of students is equal to the sum of passed and failed students,

P + F = 16000 ...(2)

By solving equations (1) and (2), we get

2P = 24000

P = 12000

Substituting the value of P in equation (2), we get

12000 + F = 16000

F = 4000

So, the number of passed students = 12000 and the number of failed students = 4000

**Step 3: Calculate the number of girls failing**

Given that the number of girls failing in the examination = 2400

So, the number of boys failing = 4000 - 2400 = 1600

**Step 4: Calculate the coefficient of association**

The coefficient of association between two attributes is given by the formula:

Coefficient of Association = (Number of students with both attributes - Expected value) / sqrt(Expected value)

Here, the two attributes are "student" and "success".

Number of students with both attributes = Number of passed students = 12000

Expected value = (Total number of students / Total number of attributes) * (Total number of attributes with the first attribute / Total number of students)

Expected value = (16000 / 2) * (12000 / 16000)

Expected value = 6000

Substituting the values in the formula, we get

Coefficient of Association = (12000 - 6000) / sqrt(6000)

Coefficient of Association = 6000 / sqrt(6000)

Using a calculator, we find that the coefficient of association is approximately 43.30.

Therefore, the coefficient of association between student and success is approximately 43.30.

-0.07042225