If you formed an algebraic expression to model the phrase "the quotient of three and a number," which operation would you need?
a. addition
b. subtraction
c. multiplication
d. division

The quotient of three and a number:
=> Which operation is needed, The answer is letter d. Division.
Quotient is the answer of the equation that uses division as operation.
For Addition the answer is called sum.
For subtraction the answer is called as difference
and for multiplication the answer is called product.
Since, the equation is the quotient of three and a number = 3 / n, where N is used as an unknown number. Thus, it uses division.