PEMDAS (Order of Operations)
12 / (6 + 4 - 8)
6
4x = 12
x = 3
2/3 + 2
8/3 or 2 2/3
You roll a nineteen-sided die (numbered one through nineteen), what is the probability you'll land on a number that is a multiple of 3?
6/19
-11 + 15
4
(16 x 2) / (9 - 5)
8
3x = 21
x = 7
4 - 1/2
7/2 or 3 1/2
A jar contains seven blue marbles, three red marbles and three green marbles, and you pick one without looking. What is the probability that the marble will be either red or green?
6/13
4 - 9
-5
1 x 5 - 5
0
8x = -32
x = -4
2/5 + 3/10
7/10
You pick one card from a standard deck (52 cards). What is the probability that the card will be the 2 of clubs?
1/52
-7 x 7
-49
3 + 4 + 9 x 2
25
2x + 4 = 16
x = 6
9/4 - 3/2
3/4
You roll an eight-sided die (with numbers one through eight). What is the probability that the value of the roll will be three?
1/8
-3 x -4
2 + 5 x 4
22
3x - 2 = 13
x = 5
2/3 * 5/2
10/6 or 5/3
A jar contains three blue marbles, seven red marbles and five green marbles, and you pick one without looking. What is the probability that the marble will be neither red nor blue?
5//15 or 1/5
-3/7 x -4/5
12/35