True/ False
Probability= Total number of outcomes possible/ number of successful outcomes possible.
False. Probability = number of successful outcomes possible/ total number of outcomes possible.
Experimental probability
is what actually occurs during a simulation or trial.
If the forecast says there’s a 40% chance of rain, what does that mean?
A) It will rain for 40% of the day
B) There’s a 40 out of 100 chance it will rain
C) It will rain in 40% of the city
D) It will rain for 40 minutes
B) There’s a 40 out of 100 chance it will rain
In a package of assorted chocolates, there are milk chocolate, dark chocolate, and white chocolate. The probability of selecting one milk chocolate is 1/6. If there are 12 milk chocolates in the package, how many total chocolates are in the package?
A. 72
B. 60
C. 18
D. 48
First, set up the proportion: number of milk chocolates total number of chocolates→16=12xtotal number of chocolates number of milk chocolates →61=x12.
Then, solve the proportion:
First set up the proportions:
number of milk chocolates/ total number of chocolates
1/6=12/x
x= 72
If an event is certain to happen, its probability is 1
True
Outcome
A single possible result of an experiment
A basket has 2 apples and 6 bananas.
What’s the probability of picking an apple?
A. 2/8
B. 1/2
C. 6/8
D. 1/8
A) 2/8 (or 1/4)
Jackie is building with blocks. She has 14 red blocks, 18 blue blocks, 22 yellow blocks, 10 green blocks, and 16 orange blocks. If she picks out a block at random, what is the probability that it is orange?
A. 9/40
B. 1/5
C. 11/40
D. 1/8
Since she has 80 total blocks and 16 are orange, the probability is 16/80 which reduces to 1/5
If you flip a fair coin 100 times, you will get exactly 50 heads.
False
Theoretical probability
What should happen based on math.
What’s the probability of the sun rising tomorrow?
A) 0
B) 1/2
C) 1
D) 1/10
C. 1 ( certain event)
Rohan rolls a 10 sided dice with sides numbered from 1 to 10. What is the probability that he rolls a prime number?
A. 1/5
B. 1/2
C.3/10
D.2/5
D. 2/5
In the set of numbers from 1 to 10, there are four prime numbers: 2, 3, 5, and 7. Thus the probability of rolling a prime number is 4/10 which reduces to 2/5. It is important to remember that 1 is NOT a prime number.
If you have a chance of winning a game, and you play twice, you are guaranteed to win at least once.
false.you could lose both times. The probability of losing twice is , meaning you have a chance of winning at least once, not
Odds
a comparison of favorable outcomes ot unfavorable outcomes.
What’s the probability of rolling an 8 on a 6-sided die?
A) 0
B) 1/6
C) 1
D) 8/6
✅ Answer: A) 0
f you flip a fair coin once, what’s the probability it lands on heads?
A) 1/4
B) 1/2
C) 1/3
D) 1
B-1/2