Probability and Odds Concepts

The video tutorial explains how to calculate the probability and odds of rain based on a weather forecast. It starts by determining the probability of no rain by subtracting the probability of rain from 100%. Then, it explains how to calculate the odds in favor of rain by comparing favorable and unfavorable outcomes. Finally, it covers the odds against rain, simplifying the ratio of unfavorable to favorable outcomes.

What is the probability that it will not rain today if the chance of rain is 80%?

• 40%

• 10%

• 20%

• 30%

Tags

CCSS.7.SP.C.5

How do you calculate the probability of no rain?

• Divide the probability of rain by 100%

• Subtract the probability of rain from 100%

• Multiply the probability of rain by 100%

• Add the probability of rain to 100%

What are the odds in favor of rain if the probability of rain is 80%?

• 80 to 20

• 20 to 80

• 30 to 70

• 50 to 50

Tags

CCSS.7.SP.C.5

If the probability of rain is 80%, how many favorable chances are there out of 100?

• 20

• 50

• 80

• 100

How can odds be expressed in different forms?

• Using a percentage

• Using a ratio and a colon

• Using a fraction and a percentage

• Using a decimal

What is the simplified form of the odds 80 to 20?

• 2 to 1

• 4 to 1

• 8 to 2

• 1 to 4

What is the greatest common factor used to simplify the odds 80 to 20?

• 20

• 30

• 10

• 40

What are the odds against rain if the odds in favor are 4 to 1?

• 1 to 4

• 4 to 1

• 2 to 3

• 3 to 2

How do you calculate the odds against an event?

• By reversing the odds in favor

• By adding the odds in favor

• By multiplying the odds in favor

• By dividing the odds in favor

What is the ratio of unfavorable outcomes to favorable outcomes if the odds against rain are 1 to 4?

• 3 to 2

• 2 to 3

• 1 to 4

• 4 to 1