Addition Rule for Probability

In a history class, 74% of the students have visited Michigan and 51% have visited Pennsylvania. If 43% of the students have visited Michigan and Pennsylvania, what is the probability that a randomly selected student has visited Michigan or Pennsylvania?

(Express your answer as a percentage)

Mathematical Equivalence

ON

Tags

CCSS.HSS.CP.B.7

David has a stack of 30 cards, which are numbered 1 through 30.

What is the exact probability of randomly selecting a card from the stack with a number that is even or is less than 10?

(Express your answer as a fraction)

Mathematical Equivalence

ON

Tags

CCSS.HSS.CP.B.7

Juanita has a bag that contains 5 red marbles, 9 yellow marbles, and 6 green marbles. Find the probability that she randomly chooses a yellow marble or a green marble.

(Express your answer as a decimal or as a simplified fraction)

Mathematical Equivalence

ON

Tags

CCSS.HSS.CP.B.7

Jana has slips of paper with the numbers 1 - 25 written on them. She randomly chooses one slip of paper. What is the probability that she chose a number that is a multiple of 6 or greater than 15?

(Express your answer as a decimal or as a simplified fraction)

Mathematical Equivalence

ON

Tags

CCSS.HSS.CP.B.7

The table shows the different probabilities for events

M and N.

What is the value of P(M or N)?

(Express your answer as a decimal or as a simplified fraction)

Mathematical Equivalence

ON

Tags

CCSS.HSS.CP.B.7

A soccer coach determines that there is a 50%

chance that a star player, Ralph, will play in a tournament. The probability that another star player, Dan, will play is 0.48. The probability that both Ralph and Dan will play in the tournament is 0.25.

Find the probability that either Ralph or Dan will play in the tournament,

(Express your answer as a decimal or as a simplified fraction)

Mathematical Equivalence

ON

Tags

CCSS.HSS.CP.B.7

What is the probability that a randomly selected person attending the concert is an adult or has purchased the ticket in advance?

(Express your answer as a decimal or as a simplified fraction)

Mathematical Equivalence

ON

Tags

CCSS.HSS.CP.B.7

A total of 50 students play either soccer or lacrosse.

20 girls play lacrosse.

20 boys play either soccer or lacrosse.

20 students play soccer.

What is the probability that a student plays soccer or is a girl?

(Express your answer as a decimal or as a simplified fraction)

Mathematical Equivalence

ON

Tags

CCSS.HSS.CP.B.7

In a litter of 10 kittens, there are 3 brown females, 1 brown male, 3 spotted females, and 3 spotted males. If a kitten is selected at random, what is the

probability that the kitten will be female or brown?

(Express your answer as a decimal or as a simplified fraction)

Mathematical Equivalence

ON

Tags

CCSS.HSS.CP.B.7

While playing a video game, Alice collects rewards every time she reaches a new level. During her last game, 40% of the rewards contained a power - up, 26% contained extra time, and

58% contained a power - up or extra time. What is the probability that a randomly selected reward contained both a power - up and extra time?

(Express your answer as a percentage)

Mathematical Equivalence

OFF

Tags

CCSS.HSS.CP.B.7