College Board Learning Objectives

For generating random values:

Write expressions to generate possible values
Evaluate expressions to determine the possible results

Randomization in our daily lives....

Rolling a dice
Lottery Tickets
Game of Marbles

Essential Knowledge

The exam reference sheet provides:

RANDOM(a, b) - which generates and returns a random integer from a to b, inclusive. Each result is equally likely to occur.
For example, random(1,3) could return 1, 2, or 3.

Adding two ranges to get a third range

Example Problem:
answer1 = random(0,2)
answer2 = random(1,5)
answer3 = answer1 + answer2

What is the possible range of results for answer3?

Answer!

[1, 2, 3, 4, 5, 6, 7]

Working with Random Number Generators
A die contains six sides with corresponding dots 1 through 6 on individual sides. Which of the following code segments can be used to simulate the results of rolling the die 3 times and assigns the sum of the values obtained by the rolls to the variable.
A) sum = 3 * random(1,6)
B) sum = random(1,18)
C) sum = random(1,6) + random(1,6) + random(1,6)

Answer!

C

Random function in Code Segment Alt text

Answer!

C 3 1 2

Using the random library

1) Using random.choice

import random

tvshows_list = ['Squid Game', 'Cobra Kai', 'Gilmore Girls', 'Sherlock Holmes', 'Barbie in the Dream House']

# pick a random choice from a list of strings.
random_tvshow = random.choice(tvshows_list)
print(f"You should watch {random_tvshow}!")

You should watch Sherlock Holmes!

Using random.shuffle

import random

num_list = [7,8,10,22]

print("List before using shuffle: ", num_list)
random.shuffle(num_list)

print("List after using shuffle method: ", num_list)

List before using shuffle:  [7, 8, 10, 22]
List after using shuffle method:  [10, 8, 7, 22]