Answer:
5
Step-by-step explanation:
Let the number of kids be x
We are given that she charge $25 per day per child
So, she charge for x kids per day = $25x
So,charge for x kids for 20 days = ![20 \times 25 x = 500x](https://tex.z-dn.net/?f=20%20%5Ctimes%2025%20x%20%3D%20500x)
Her expenditure per day per kid is of $5
So, her expenditure per day for x kids = $5x
So, her expenditure 20 days for x kids = ![20 \times5 x = 100x](https://tex.z-dn.net/?f=20%20%5Ctimes5%20x%20%3D%20100x)
So, she gained for taing care of x kids for 20 days = 500x-100x = 400x
Since we are given that her target is to earn $2000
So, A.T.Q
![400x= 2000](https://tex.z-dn.net/?f=400x%3D%202000)
![x= \frac{2000}{400}](https://tex.z-dn.net/?f=x%3D%20%5Cfrac%7B2000%7D%7B400%7D)
![x=5](https://tex.z-dn.net/?f=x%3D5)
Hence the minimum number of kids she has to watch per weekday that month is 5