Final answer:
The total number of buttons in the box is 90. The correct answer is not mentioned.
Step-by-step explanation:
To find the total number of buttons in the box, we need to determine the number of sets of 10 buttons. Each set contains 2 red buttons, 3 green buttons, 1 yellow button, and 4 blue buttons. If there are 18 red buttons, we can calculate the number of sets as follows:
Number of sets = Number of red buttons / Number of red buttons in each set
Number of sets = 18 / 2 = 9 sets
To find the total number of buttons, we multiply the number of sets by the number of buttons in each set:
Total number of buttons = Number of sets x Number of buttons in each set
Total number of buttons = 9 sets x 10 buttons = 90 buttons
Therefore, the total number of buttons in the box is 90. Hence the correct answer is not present in the option.