Probability

What is the probability of an event?

• The probability of an event is a negative number

• The probability of an event is a positive integer

• The probability of an event is a number greater than 1

• The probability of an event is the measure of the possibility that said event will occur, expressed as a number between 0 and 1.

Imagine you're a magician, and in your next trick, you'll pull a card from a standard deck of 52 cards. What are the chances it's a red card?

• 1/2 or 0.5

• 3/4

• 1/3

• 1/4

If you roll a 6-sided die, what is the probability of getting an odd number?

• 1/2

• 1/5

• 1/4

• 1/3

Imagine you're a magician, about to perform your next big trick: pulling two aces in a row from a standard deck of cards without looking. What's the magical probability of this astonishing feat happening?

• 1/221

• 1/312

• 1/52

• 1/104

Imagine you're a pirate, and in your treasure chest, you find 5 red rubies, 3 green emeralds, and 2 blue sapphires. If you were to pick one gemstone at random, what are the chances you'll grab an emerald?

• 0.2

• 0.3

• 0.5

• 0.8

Imagine you're a pirate, and you've just found a treasure chest full of gold coins! Excited, you flip one coin to decide who gets to open the chest. What's the chance it lands heads up, letting you do the honors?

• 2/3

• 1/2

• 1/4

• 1/3

If you have a loaded die that is more likely to land on the number 6, what is the probability of getting a 6 when you roll it?

• Less than 1/6

• Exactly 1/6

• More than 1/6

• More than 1/2

Imagine you're at a fancy casino, the lights are dazzling, and you're standing in front of a gleaming roulette wheel. It's divided into 18 red slots, 18 black slots, and one special green slot. If you decide to bet on red, what are your chances of winning that bet?

• 18/37

• 1/3

• 1/2

• 1/4

What is the probability of drawing a king from a deck of 52 cards at random?

• 1/52

• 1/39

• 1/13

• 1/26

If you have a urn with 4 white balls, 3 black balls, and 2 red balls, what is the probability of drawing a black ball?

• 3/5

• 1/3

• 1/4

• 2/9