You will choose 1 cheese 3 different ways because there are three types of cheeses.
You will choose your topings 6 different ways. 4!/(2!2!) = 4*3/2 = 6
Therefore you will be able to get 6 * 3 different pizzas = 18 pizza combinations.
To confirm the toppings, suppose they are (M)ushrooms (P)epperoni (O)nions and (B)acon
M P
M O
M B
P O
P B
O B
Total 6.The order doesn't matter here. M O is the same thing as OM
It would be the same you would already be dividing by 3 because it’s the denominator and the numerator is 2
The school purchase 1200 notebooks
<span>a plane figure with four straight sides and four right angles, especially one with unequal adjacent sides, in contrast to a square.</span>
The area of a triangle is 180