Final answer:
To find the number of bars Harry sold on Wednesday, determine the number of bars he sold on Tuesday and use the given information about the ratio of sales. The correct answer is 30 bars.
Step-by-step explanation:
To find the number of bars Harry sold on Wednesday, we need to first determine how many bars he sold on Tuesday. Let's call the number of bars he sold on Tuesday 'x'. According to the given information, Harry sold 3 times as many bars on Wednesday as on Tuesday. So, the number of bars sold on Wednesday would be 3x. On Thursday, he sold 5 times as many bars as on Tuesday, so the number of bars sold on Thursday would be 5x.
Now, we can set up an equation to find the value of 'x':
x + 3x + 5x = 90
Combine like terms:
9x = 90
Divide both sides by 9:
x = 10
Therefore, Harry sold 10 bars on Tuesday, 3(10) = 30 bars on Wednesday. So, the correct answer is D. 30 bars.