Question

How many different ways can he use the two types of stamps to total 0.40 in postage?

A) 1 way
B) 2 ways
C) 3 ways
D) 4 ways

Answer 1

To make a total of 0.40 in postage with two types of stamps, one worth 0.05 and the other worth 0.25, there are 2 valid combinations: 0.05 stamps only, or one 0.25 stamp combined with 0.05 stamps. Other combinations exceed or don't reach the required total.

Step-by-step explanation:

The question is asking about the different ways to make up a total of 0.40 in postage using two types of stamps. To solve this problem, we need to find all the combinations of stamps that add up to 0.40. Let's assume the two types of stamps have values of 0.05 (five cents) and 0.25 (twenty-five cents).

Here are the possible combinations:

• Eight 0.05 stamps (8 x 0.05 = 0.40)
• One 0.25 stamp and three 0.05 stamps (1 x 0.25 + 3 x 0.05 = 0.40)
• Two 0.25 stamps (2 x 0.25 = 0.50) This combination is not valid because it exceeds 0.40.

Hence, there are 2 ways to make 0.40 in postage with these two types of stamps. Therefore, the correct answer is B) 2 ways.