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### Session 19 has these questions

Average of Three Numbers

Write a program to get the average of three numbers;
``` class ThreeNumbersAverage {    public static void main(String s[])    {        System.out.println("Average of 15, 70 and 27 is " + average(15, 70, 27));    } public static int average(int a, int b, int c) { int result = 0; //Write code here to get the average of a, b and c and assign it to result return result; } } ```

Calculate sum of doubles

What will be the output of the following program?
`class SumOfDoubles{    public static void main(String args[])    {            double d1 = 0.7;        double d2 = 77.0/1000.0;        double d3 = d1 * 10;        double d4 = 77E+2;        double d5 = 77E-5;        double sum = d1 + d2 + d3 + d4 + d5;                System.out.println("sum = " + sum);    }}`
 A. sum = 7707.77777 B. sum = 7777.77777 C. Compilation errors. D. sum = 7770.77077

Evaluate Equation

Write a program to get the value of y for a given x where
`y = 4x^2 - 22x + 129; // x^2 is x square`
``` class Function1 {    public static void main(String s[])    {        System.out.println("When x = 5, y is " + calculateY(5) );    } public static int calculateY(int x) { int y = 0; //Write code here to calculate the value of y for the given x. return y; } } ```

Multiply two numbers

Write a program to multiply two numbers.
``` class MultiplyNumbers {    public static void main(String s[])    {        System.out.println("Multiplication of 5 and 7 is " + multiply(5,7));    } public static int multiply(int a, int b) { int result = 0; //Write code here to multiply a and b and assign it to result return result; } } ```

``` class AddNumbers {    public static void main(String s[])    {        System.out.println("Sum of 21 and 18 is " + sum(21, 18));    } public static int sum(int a, int b) { int result = 0; //Write code here sum a and b and assign it to result return result; } } ```