24 can not be the total number of students in Mr. Castillo's class.
I'm assuming that your answer options are 20, 24, 25, and 30.
out of this set of numbers, 24 can not be divided by 5 (without getting a decimal)
The probability of picking one girl would be 
. That is because there are 5 girls out of the 12 students, and the probability of an event occuring is: 
.
Using that same logic, the next student should be easier. We reduced the student population by 1, so we have 11 possible ways it can happen now instead of 12, so that gives us:
, for the probability of picking a boy as the second pick.
And lastly, using the same logic shown above, the probability of picking a girl on the third pick would be:
.
We are not done, though. We have the separate probabilities, but now we have to multiply then together to figure out the probability of this exact event happening:
Which when reduced is:
7:8 it could also be written as 7 to 8 or 7/8
Since we need to find out SIXTH to FIFTH grades we have to put the sixth graders first. Hope this helps and have a great day!
Complete question:
Kono divides The numerator and the denominator of 48 over 72 by the greatest common factor to simplify the fraction in one step by what number does he divide
Answer:
2/3
Step-by-step explanation:
Given the number : 48 / 72
Obtain the greatest common factor of 48 and 72
- - - - 48 - - - - 72
- 2-- 24 - - - - 36
- 2 - 12 - - - - - 18
- 2 - 6 - - - - - - 9
- 3 - 2 - - - - - - 3
The greatest common factor of 48 and 72 is hence (2 * 2 * 2 * 3) = 24
Hence, divide both the numerator and denominator by 24 ;
Numerator = 48/24 = 2
Denominator = 72 / 24 = 3
= 2/3
