Out of a class of 20 students, your teacher chooses students at random to present their projects . what is the probable that she chooses you first ,and then chooses kim second

The probability is:

We know that the probability of an outcome is the number of favorable outcomes to the total number of outcomes.

The probability that she  chooses you first ,and then chooses Kim second is given by:

( Since, firstly she needs to choose 1 student out of a total of 20 students and then she needs to choose 1 student i.e. kim out of the remaining 19 students )

Hence,

1. is 4 and 2. is 3

step-by-step explanation:

so if you look at the first one you see that 1 is to 4 and 2 is to 8 and so on, so you can see for every 1 there is a times 4 so if it were 3 then it would be 3*4 and it is 12

for number 2 it is 3 because 1 is to 3 and 2 is to 6 so for every 1 there is 3 so if it were 3 then there would be 3*3 = 9