ACT Math Practice

Front

What is the formula for calculating probability?

Back

Probability = (Number of favorable outcomes) / (Total number of outcomes)

Front

If a bag contains 8 red marbles, 9 yellow marbles, and 7 green marbles, how many total marbles are there?

Back

Total marbles = 8 + 9 + 7 = 24

Front

What is the average of a set of numbers?

Back

Average = (Sum of all numbers) / (Total count of numbers)

Front

How do you calculate the average of a new list of numbers when one number changes?

Back

Replace the old number with the new number, sum the new list, and divide by the total count.

Front

What is the absolute value of a number?

Back

The absolute value of a number is its distance from zero on the number line, always non-negative.

Front

Back

Front

How do you solve an expression with variables?

Back

Substitute the variable with its value and perform the operations according to the order of operations.

Front

What is the order of operations in mathematics?

Back

PEMDAS: Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right).

Front

Back

Front

Back

Total students = 180; A = 180 * (1/4) = 45; B = 180 * (1/3) = 60; C = 180 - (A + B) = 180 - (45 + 60) = 75.