So i have two lists like this

<select id="list1"> 
<option value="1">one</option> 
<option value="2">two</option> 
<option value="3">three</option> 
<option value="4">four</option> 
<option value="5">five</option> 
</select> 

<select id="list2"> 
<option value="1">one</option> 
<option value="2">two</option> 
<option value="3">three</option> 
<option value="4">four</option> 
<option value="5">five</option> 
</select> 

if (answer < 7) { 
greeting = "hello"; 
} else { 
greeting = "Good bye"; 
}

Now what I want to happen is to add both selected values. I.e. 2+4. Then I want to take the answer from the addition (6) and use it in a if, else statement.

I'm new to coding so if you could help me that would be awesome. Or resources that can help would be awesome too. I learn majority from w3schools.com