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Mary, Ana, and Nata work at a coffee shop. Each day from Monday to Friday, exactly two of them come to work. Mary works 3 days per week, and Ana works 4 days per week. How many days per week does Nata work?

Answer :

We know that Mary works 3 days per week and Ana works 4 days per week. From Monday to Friday, there are 5 days in total. Since exactly two of them come to work each day, we can subtract the combined days that Mary and Ana work from the total number of days to find out how many days Nata works.

Since exactly two of them work each day, we can deduce that Nata must be working on the days when Mary and Ana are not working together. Mary works 3 days, which means there are 2 days left for Nata to work. Ana works 4 days, which means there is 1 day left for Nata to work.

Adding these days together, Nata works a total of 2 + 1 = 3 days per week. So, Nata works 3 days per week at the coffee shop.

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Rewritten by : Barada

Final answer:

Nata works 3 days per week. This is found by calculating the total number of worker-days needed per week (10) and subtracting the days worked by Mary (3) and Ana (4), which equals 3 days remaining for Nata.

Explanation:

To determine how many days per week Nata works at the coffee shop, we can use the information provided about Mary and Ana's work schedules. Since the coffee shop is staffed by exactly two workers each day from Monday to Friday, and we have a total of 5 working days in a week, we can calculate the total number of worker-days as 5 days times 2 workers, which is 10 worker-days per week.

Mary works 3 days per week, and Ana works 4 days per week. Adding together Mary's and Ana's work-days, we have 3 (Mary's days) plus 4 (Ana's days), equaling 7 worker-days. Since the total number of worker-days per week is 10, we subtract the days worked by Mary and Ana from this total to find Nata's work-days. Therefore, 10 worker-days minus 7 worker-days equals 3 worker-days. So, Nata works 3 days per week.