(a) What is a combination of r elements of a set? How many combinations are there of n elements taken r at a time?
(b) How many subsets does a set with n elements have?
(c) A pizza parlor offers ten different toppings. How many three-topping pizzas are possible? How many pizzas are possible?
The combination of elements, and find the number of combinations of elements taken at a time.
A combination of elements from a set is any subset of the set that contains elements.
If a set has objects, then the number of combinations of elements from the set is denoted and is called the number of combinations of objects taken at a time is given by,
The number of subset does a set with elements have.
The possible number of three topping pizzas, and number of possible pizzas.
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