Question

As you were in a hurry to catch a flight, you picked two out of your four credit cards at random, without even looking. One of the four cards has reached its balance limit and can no longer be used for purchases. What is the probability that you picked one good (=usable) and one bad card? (Hint: Give the cards names, list all possible pairs picked, and then count pairs that have one good and one bad card.) Group of answer choices

Answer 1

Answer:

P = 0.5

Step-by-step explanation:

There are four cards.

Lets say,

Card 1 = A

Card 2 = B

Card 3 = C

Card 4 = D

Lets suppose that A has reached its limit. Listing all possibilities of picking 2 random cards.

1st possibility = A and B

2nd possibility = A and C

3rd possibility = A and D

4th possibility = B and C

5th possibility = B and D

6th possibility = C and D

There are three possibilities that the card which has reached its limit will be picked with the usable card. Calculation probability.

P = total number of wanted outcomes / total number of possible outcomes

P = 3/6

P = 0.5