Probability Concepts and Problems

The video tutorial introduces the concept of probability, explaining it as the likelihood of an event occurring. It covers different types of probability: equal, likely, unlikely, certain, and impossible, using examples with pens, balls, and dice. The tutorial also includes practical exercises to help understand these concepts better.

What is the basic definition of probability?

• The number of outcomes in an event

• The impossibility of an event

• The likelihood of an event happening

• The certainty of an event occurring

Which of the following is an example of equal probability?

• Picking a red or blue pen from a bag with one red and one blue pen

• Picking a red pen from a bag with two red pens

• Choosing a card from a deck of cards

• Rolling a die and getting a number greater than 4

If there are two red pens and one blue pen, what is the probability of picking a red pen?

• 1/2

• 3/3

• 2/3

• 1/3

Which of the following is an example of likely probability?

• Choosing a card from a deck and getting a heart

• Rolling a die and getting a number greater than 1

• Picking a green ball from a set of all blue balls

• Picking a blue pen from a set of all red pens

If there are three red balls and three blue balls, what is the probability of picking a red ball?

• 1/2

• 1

• 1/3

• 2/3

In a set of five balls, one blue, two red, and two green, what is the probability of picking a blue ball?

• 4/5

• 2/5

• 3/5

• 1/5

If there are two red balls and one blue ball, what is the probability of picking a blue ball?

• 1/2

• 2/3

• 1/3

• 1

If there are three red balls and two green balls, what is the probability of picking a green ball?

• 2/5

• 4/5

• 3/5

• 1/5

What does 'certain probability' mean?

• An event has equal chances of happening

• An event is impossible to happen

• An event is unlikely to happen

• An event will definitely happen

If a bag contains only blue pens, what is the probability of picking a blue pen?

• 1

• 0

• 1/2

• 1/3