### Instruction: Alice's white water rafting class is composed of 40 students and 10 instructors, including herself.  She has 20 life vests on hand.  20% of her students are bringing life vests.  How many more life vests will Alice need to get so that entire class has one? Let's write a Python program to solve it.### Response: # total number of people in the class
total_people = 40 + 10

# number of students bringing life vests
students_with_vests = 40 * 0.20

# total number of life vests available
total_vests = 20 + students_with_vests

# number of vests required
vests_required = total_people - total_vests

print(int(vests_required))