# Challenge 2: Calculate the Student's Performance

In this exercise, you have to calculate a student's total marks using the concept of Classes.

## We'll cover the following

## Problem statement

Implement a class - `Student`

- that has four properties and two methods. All these attributes (properties and methods) should be **public**. This problem can be broken down into three tasks.

### Task 1

Implement a constructor to initialize the values of four properties: `name`

, `phy`

, `chem`

, and `bio`

.

### Task 2

Implement a method – `totalObtained`

– in the `Student`

class that calculates total marks of a student.

**Sample properties**

```
name = Mark
phy = 80
chem = 90
bio = 40
```

**Sample method output**

```
obj1.Total()=210
```

### Task 3

Using the `totalObtained`

method, implement another method, `percentage`

, in the `Student`

class that calculates the percentage of students marks. Assume that the total marks of each subject are **100**. The combined marks of three subjects are **300**.

The formula for calculating the percentage is given below.

$Percentage=$ $\frac{Marks\:Obtained}{Total \: Marks}\times100$

**Sample input**

```
phy = 80
chem = 90
bio = 40
```

**Sample output**

```
70
```

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