Bell Work. 2. Samuel has a bowl of fruit containing 3 apples, 2 oranges and 5 pears. If he randomly picks 1 piece of fruit from the bowl, what is the probability it will be a pear or an apple?. 1. What’s the probability that the spinner will land on blue?. Answers. 1. 2. 2. 3. 1. 4. 8.
2. Samuel has a bowl of fruit containing 3 apples, 2 oranges and 5 pears. If he randomly picks 1 piece of fruit from the bowl, what is the probability it will be a pear or an apple?
1. What’s the probability that the spinner will land on blue?
10 fruits total
- It is how a probability of an event “should” happen.
- Experimental probability refers to the probability of an event occurring when an experiment was conducted.
There is a bag of blue, green and red chips. There is a 12% possibility of randomly picking a blue chip and a 25% chance of randomly picking a red chip. What is the probability of picking a green chip?
Hint: Your three options are green, blue and red. Their probability will add up to 100%
P(event) = number of times event occurs
total number of trials
You tossed a coin 10 times and recorded heads 3 times and tails 7 times
P(head)= 3/10 , 0.3 or 30%
A head shows up 3 times out of 10 trials,
P(tail) = 7/10, 0.7 or 70%
A tail shows up 7 times out of 10 trials
Both probabilities are ratios that compare the number of favorable outcomes to the total number of possible outcomes
All results will add up to 100% every time!
P(head)= 3/10 or 30%
P(tail) = 7/10 or 70%
P(head) = 1/2 or 50%
P(tail) = 1/2 or 50%
You draw a marble out of the bag, record the color, and replace the marble. After 5 draws, you record 2 red marbles. According to your experiment what is the probability of drawing each color?
P(red)= 2/5, 0.4 or 40%
P(blue)= 3/5, 0.6 or 60%
P(rolling a 6)
Number of favorable outcomes
Total number of rolls
You roll a number cube 100 times. Your results are given in the table below. Find the experimental probability of rolling a 6. Write your answer as a percent.
= 0.18 = 18%
If you rolled the number cube 300 times then how many times would you predict that you would roll a 3 according to your experiment?
P(rolling a 5) = 3/60 = 1/20
P(rolling a 5) = 1/6
A class group flipped a coin and recorded their results below. What is their experimental probability of landing on heads?
The group landed on heads 6 times, so the experimental probability is:
1/5 = 20%