Calculating Probability

The shelf life of a particular dairy product is normally distributed with a mean of 12 days and a standard deviation of 3 days.

About what percent of the products last between 12 and 15 days?

Tags

CCSS.HSS.ID.A.4

Suppose a number cube is rolled twice. What is the probability that an odd number will show both times?

• 1/3

• 1/2

• 1/6

• 1/4

What is the probability of tossing a coin four times and getting tails each time?

• 1/16

• 1/8

• 1/2

• 1/4

Ten cards numbered 1-10 are placed in a hat. What is the probability of randomly drawing a card with an even number then a card with a number greater than or equal to five if the first card is replaced?

• 1/4

• 2/3

• 3/10

• 3/5

You find probability by setting up a ​ (a)   . This should be equal to ​ (b)   over ​ (c)   .

• proportion

• event

• total

• probability

• prediction

• equal

Tags

CCSS.7.SP.C.7B

What is the probability that you will get this question right? (a)  

• 1/4

• 5/6

• 7/100

• 25/50

Tags

CCSS.MATH.CONTENT.7.SP.A.2

If you spun the spinner 1 time, what is the probability it would land on a black piece?

• 1 / 7

• 2 / 7

• 3 / 7

• 4 / 7

Tags

CCSS.7.SP.C.7B

P(event) = ​ (a)   /​ (b)  

• desirable outcome

• total outcomes

• complement

• complement

• minimum outcome

• probability

• minimum outcomes

• 100

Tags

CCSS.7.SP.C.5

A marble bag contains 3 red marbles, 4 gray marbles, 6 white marbles, and 5 black marbles. What is the probability of randomly drawing a red marble and then a gray marble if the first marble is replaced?

• 1/9

• 1/27

• 1/6

• 2/9

When randomly drawing from a standard deck of 52 playing cards, what is the probability of drawing a 9 four times in a row if the cards are not replaced?

• 1/5,525

• 1/270,725

• 1/28,561

• 1/4