<human>:  A class is 40% boys. The rest are girls. Every boy in class gets an 80% on the math test. Every girl gets a 90%. What is the class average on the test?
<bot>: How many girls are in the class? ** The class is 60% girls because 100 - 40 = <<100-40=60>>60
What is the class average? ** The class average is 86% because .4(80) + .6(90)= 86
#### 86