Using the combination formula, the probability that Rosa's mom chooses sausage and onion is given by:
B. [tex]\frac{1}{C_{8,2}}[/tex].
The order in which the toppings are chosen is not important, hence the combination formula is used to solve this question.
What is the combination formula?
[tex]C_{n,x}[/tex] is the number of different combinations of x objects from a set of n elements, given by:
[tex]C_{n,x} = \frac{n!}{x!(n-x)!}[/tex]
2 toppings are chosen from a set of 8, hence the number of options is given by:
[tex]C_{8,2}[/tex].
Sausage and onion correspond to one topping, hence the probability is given by:
B. [tex]\frac{1}{C_{8,2}}[/tex].
More can be learned about the combination formula at https://brainly.com/question/25821700
#SPJ1
