Harriet is making a batch of cookies and going to use 3 c chocolate chips for every 24 she makes if plans on 48 how many cups does need?

Harriet will need 6 cups of chocolate chips.

This is a proportion problem. We can set up a proportion like this:

```

3 cups / 24 cookies = x cups / 48 cookies

```

To solve for x, we can cross-multiply:

```

3 cups * 48 cookies = 24 cookies * x cups

144 cups = 24x

Solving for x :

x = 144 cups / 24

x =6

```

Therefore, Harriet will need 6 cups of chocolate chips to make 48 cookies.