Question

Karl has stamps in his desk drawer. The possible combinations of stamps are shown below. A 2-column table with 5 rows. The first column, the number of 45-cent stamps, has the entries 18, 20, 22, 25. The second column, the number of 65-cent stamps, has the entries 17, 15, 13, 10. Which statement about the stamps is correct? The total number of stamps is 25. The total value of the stamps is $18. 75. The total number of stamps is 35. The total value of the stamps is $19. 15.

Answer 1

The total number of stamps with Karl is 35 while the value of all stamps with Karl is $19.15.

What is the total number of stamps?

We want to know the total number of stamps with Karl, therefore, we will add the number of stamps in every possible case,

18 + 17 = 35

20 + 15 = 35

22 + 13 = 35

25 + 10 = 35

Since the sum of a total number of stamps is coming out to be 35 in every case.

Thus, statement C is correct, therefore, the total number of stamps is 35.

What is the value of the stamps that are with Karl?

To know the total value of the stamps with Karl we will calculate the value of the stamps that are with Karl,

18(0.45) + 17(0.65) = $19.15

20(0.45) + 15(0.65) = $19.15

22(0.45) + 13(0.65) = $19.15

25(0.45) + 10(0.65) = $19.15

Thus, the total value of Karl's stamps is $19.15.

Hence, the total number of stamps with Karl is 35 while the value of all stamps with Karl is $19.15.

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