Respuesta :
2 sizes, 7 toppings and 3 crusts
multiply the choices together:
2 * 7 * 3 = 42 different pizzas
multiply the choices together:
2 * 7 * 3 = 42 different pizzas
Sarah could select from 42 different pizzas.
What is a combination?
A combination is a selection of all or part of a set of objects, without regard to the order in which objects are selected.
For the given situation,
Number of sizes of pizza = 2
Number of toppings = 7
Number of choices of crust = 3
The formula for combination is nCr = n! / r!(n-r)!
The number of different pizzas Sarah could select for her order,
⇒ [tex](2C_{1}) (7C_{1} )(3C_{1} )[/tex]
⇒ [tex](2)(7)(3)[/tex]
⇒ [tex]42[/tex]
Hence we can conclude that Sarah could select from 42 different pizzas.
Learn more about the combinations here,
https://brainly.com/question/20211959
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