Math - Probability

Question 1

How

What is the probability of rolling a 2 or 3 using a six-sided die?

Answer 1

number of ways an event could happen/number of possible outcomes

= 2 (roll 2 or 3) / 6
=⅓

Question 2

How to calaculate probability?

Answer 2

number of ways an event could happen/number of possible outcomes

Question 3

How many cards are in a standard deck? How many suits is in each deck? And how many cards in each suit?

Answer 3

52 cards total

4 suits

13 cards in each suit

Question 4

Compare a independent event from a dependent event

Answer 4

Independent event: event not affect by previous event (ex: flipping a coin; the first flip doesnt affect the outcome of the second flip)

Dependent event: outcome of first event affects the outcome of the second event (pulling cards from a deck but not replacing them)

Question 5

A bag of marbles contains 4 red marbles, 7 blue marbles, and 1 yellow marble. If a blue marble is randomly pulled from the bag and not replaced, what is the probability that the second marble drawn is also blue?

Answer 5

number of ways an event could happen/number of possible outcomes

= 6 (7 initially - 1 blue pulled first round)/11 (12 initially - 1 pulled and not replaced)

= ~55%