Rosa is ordering a single-topping pizza to share with friends. There are 10 toppings to choose from and 9 crust choices. For the cheese, Rosa can choose one of the 6 options. How many different pizzas can Rosa order?

540

Step-by-step explanation:

Ok, let's write all the possible selections and the number of options for each selection:

1) Toppings: Here we have 10 options.

2) Crusts: 9 options.

3) Cheese: 6 options.

Now, the total number of different combinations is equal to the product of the number of options for each selection.

So we have:

10*9*6 = 540 different possible single-topping pizzas.

answer: for each 3 girls there is 2 boys . 3: 2

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