how many ways can Aileen choose 2 pizza toppings from a menu of 19 toppings if each topping can only be chosen one​

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how many ways can Aileen choose 2 pizza toppings from a menu of 19 toppings if each topping can only be chosen one​

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Thái Dương 5 years 2021-08-15T21:16:01+00:00 1 Answers 48 views 0

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  1. nguyetanh
    0
    2021-08-15T21:17:55+00:00
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    Answer:

    There are 342 different combinations.

    Step-by-step explanation:

    Ok, Aileen is choosing toppings for a pizza.

    She can choose two.

    There are 19 options that can be chosen once.

    The first thing we need to do, is find all the “selections”.

    Here we have two selections:

    Topping number 1

    Topping number 2.

    Now we need to find the number of options for each one of these selections:

    Topping number 1:  Here we have 19 options.

    Topping number 2:  Here we have 18 options (because one was already taken in the previous selection)

    The total number of combinations is equal to the product between the numbers of options.

    C = 19*18 = 342

    There are 342 different combinations.

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