Let's begin by listing out the information given to us:
There are four students: n = 4
Number of students to be selected: r = 2
To calculate the combination of 2 students to be chosen, we use:
Therefore, there 12 possible combinations from these
Answer:
Step-by-step explanation:
-2(3x-2)+x+9
-2(-9-2)-3+9
18+4-3+9
22-3+9
19+9
=28
Day is 123
Hope this helps!!