Answer:
Katye will be left with $7 if she donates to as many charities as possible
Step-by-step explanation:
The total number of gifts Katye received = 15
The total amount in cash she received = $100
The cost of the book purchased from the gift amount = $23
So, the money left with her = Total money - Cost of the book
= $100 - $23 = $77
So, she still has $77 left with her.
Now, she wants to donate $10 to as many charities as she can.
![\textrm{Number of charities she can donate to} = \frac{\textrm{Total amount to be donated}}{\textrm{Amount donated to each charity}} \\ = \frac{77}{10} = 7.7](https://tex.z-dn.net/?f=%5Ctextrm%7BNumber%20of%20charities%20she%20can%20donate%20to%7D%20%3D%20%5Cfrac%7B%5Ctextrm%7BTotal%20%20amount%20to%20be%20donated%7D%7D%7B%5Ctextrm%7BAmount%20donated%20to%20each%20charity%7D%7D%20%5C%5C%20%3D%20%5Cfrac%7B77%7D%7B10%7D%20%20%3D%207.7)
As 7.7 is NOT a WHOLE number. So let us take the nearest smaller whole number to 7.7 which is 7.
Hence, she can donate to 7 charities.
Amount donated to 7 charities = 7 x $10 = $ 70
⇒ The money left with Katye = Total money to be donated - Donated amount = $77 - $70 = $7
Hence, Katye will be left with $7 if she donates to as many charities as possible.