You roll a number cube 20 times. The number 4 is rolled 8 times. What is the experimental probability of rolling a 4?
A. 40%
B. 25%
C. 20%
D. 17%
How do I work this problem out? Please explain. Thank you.
100 * 8/20 = 5*8 = 40%
It kind of looks that way :)
Ty Damon.
You are welcome.
Do you have time for a few more?
Try them first. I am not sure I will be here but someone probably will be.
Alright.
To find the experimental probability of rolling a 4, you need to divide the number of times you rolled a 4 by the total number of rolls.
In this case, you rolled the number cube 20 times and got a 4 8 times. So, the experimental probability of rolling a 4 is:
Experimental Probability = Number of times a 4 was rolled / Total number of rolls = 8 / 20.
To simplify this fraction, you can divide both the numerator and denominator by their greatest common factor (GCF), which is 4 in this case. When you divide 8 by 4, you get 2, and when you divide 20 by 4, you get 5.
So, the simplified fraction is 2/5.
Now, to express this fraction as a percentage, you can multiply the fraction by 100.
2/5 * 100 = 40.
Therefore, the experimental probability of rolling a 4 is 40%.
Therefore, the correct answer is A. 40%.