00:01
Hey there, welcome to numerate.
00:03
So we are looking at a table here of the grade level and the number of students at each grade level.
00:12
So with this, we're asked to find a probability for number 6 and 7.
00:17
So what we have to find is our sample size.
00:21
So we're going to add up all the values here, the sum of the frequencies, the number of students, which gives us a total of 2 ,495.
00:34
2 ,900, 2 ,495.
00:40
So if a student is selected randomly, what is the probability that the student is either a junior or a senior? so therefore this probability will equal.
00:50
We're going to add the two frequencies together of the junior and senior.
00:55
So we have 483 plus 445.
01:03
And this is divided by the sample size.
01:10
In which we know it equals 2 ,495.
01:15
All right.
01:22
So let's see what we get...