Hey there!
To start, out of the 20 numbers-of-the-day you can choose, there are 5 numbers in which are greater than 15.
This can be represented by the fraction 5/20 or, when simplified, 1/4. This fraction would be the probability of choosing a number greater than 15.
Because your probability or choosing a number greater than 15 would be 1/4, in order to approximate how many days of the school days the number chosen is greater than 15, you would multiply the probability of choosing a number greater than 15 by 180, the number of days at school:
1/4 * 180
This would result in your answer, 45.
Therefore, there will be 45 predicted school days where the number chosen is greater than 15.
Hope this helps and have a nice day! Let me know if you have any other questions about this answer! :)
