Probability of Picking Marbles

This video tutorial focuses on solving probability word problems using marbles of different colors. It covers calculating the probability of selecting specific marbles, both with and without replacement, and explains the concepts of 'and' and 'or' in probability. The video also provides methods to calculate the probability of not selecting certain marbles and includes practice problems to reinforce learning.

What is the probability of picking a green marble from a jar with 7 red, 6 green, 5 blue, and 2 yellow marbles?

• 1/5

• 1/4

• 3/10

• 1/3

If the probability of picking a blue marble is 25%, what is the probability of not picking a blue marble?

• 100%

• 50%

• 75%

• 25%

How do you calculate the probability of picking either a green or a yellow marble?

• Multiply their probabilities

• Subtract their probabilities

• Add their probabilities

• Divide their probabilities

What is the probability of picking a red marble followed by a blue marble with replacement?

• 1/2

• 3/10

• 1/4

• 7/80

How does the probability change when picking a red marble followed by a blue marble without replacement?

• Increases

• Decreases

• Stays the same

• Becomes zero

What is the probability of picking a red and then a blue marble without replacement, considering any order?

• 1/2

• 14/76

• 3/8

• 7/38

What is the probability of picking a red marble first and then a green marble with replacement?

• 13/100

• 7/20

• 3/10

• 1/5

If you pick a blue marble first, what is the probability of picking a yellow marble next with replacement?

• 1/2

• 1/4

• 1/5

• 1/10

What is the probability of picking a red marble and then a blue marble without replacement?

• 3/10

• 1/4

• 7/76

• 1/2

What is the probability of picking a blue marble first and then a red marble without replacement?

• 7/76

• 3/10

• 1/2

• 1/4