✔ Probability values always lie between zero and one inclusive.
Q2. What is the probability value of an impossible event?
✔ Impossible events never occur so their probability is zero.
Q3. What is the probability value of a sure event?
✔ Sure events always occur so their probability is one.
Show transcript
[Slide 1] Understanding Probability Range
Welcome back students. Today we explore the limits of probability values. Remember, chance cannot be negative or exceed certainty.
[Slide 2] Impossible and Sure Events
An impossible event never happens, so its value is zero. A sure event always happens, making its value one.
[Slide 3] Rolling a Die Example
Let's roll a standard die with numbers one through six. We will calculate the probability of getting a seven.
[Slide 4] Calculating Impossible Event
Since seven does not exist on the die, favorable outcomes are zero. Dividing zero by six gives a probability of zero.
[Slide 5] Avoiding Probability Errors
Students often calculate values greater than one or negative numbers. Always check if your answer lies within the valid range.
[Slide 6] Key Takeaways Summary
To recap, probability stays between zero and one. Master these special events for your upcoming board exams.