Probability Problem Solving with Examples

The video tutorial introduces the concept of probability, focusing on empirical probability through examples such as coin tosses and frequency tables. It explains how to calculate probabilities in different scenarios, including using colored balls in a bag. The tutorial emphasizes understanding probability concepts and applying them to solve problems.

What is empirical probability?

• A probability calculated using permutations

• A probability derived from historical data

• A probability based on theoretical outcomes

• A probability that is always equal to 0.5

If 4 coins are tossed 100 times, and 2 heads appear 25 times, what is the probability of getting 2 heads?

• 0.50

• 0.25

• 0.75

• 1.00

In a class of 45 students, if 3 students scored less than 30 marks, what is the probability of randomly selecting a student who scored less than 30?

• 0.03

• 0.15

• 0.07

• 0.10

How do you calculate the probability of a student scoring 60 marks or above if 22 students scored that?

• 22/30

• 22/60

• 22/45

• 22/100

What is the probability of drawing a blue ball from a bag containing 5 red, 7 yellow, and 8 blue balls?

• 0.20

• 0.30

• 0.50

• 0.40

If the probability of drawing a blue ball is 0.4, what is the probability of not drawing a blue ball?

• 0.6

• 0.5

• 0.7

• 0.4

Which formula can be used to find the probability of an event not happening?

• 1 - Probability of the event happening

• Probability of the event happening

• Probability of the event happening + 1

• Probability of the event happening - 1