Answer:
Thursday
Step-by-step explanation:
Positive sign denotes that it has gained
The answer is 510 centiliters
<em>Data</em>
• Morning: 156 times
,
• Lunch: x times
,
• Afternoon: 201 times
,
• Whole day: 562 times
<em>Procedure</em>
To know how many times did it ring at lunch, we have to build a relation, in which we know that the addition of the times in the morning, lunch, and afternoon equal the times it rang the whole day:

Then, we have to solve for <em>x </em>considering that it represents the times it rang during the lunch.



Answer: It rang 205 times during the afternoon.