10 guests brought chips. To find the total number of guests who brought each item, all you need to do is divide 24 by the number in the fractions denominator. Then, add your answers and subtract them from 24 to get the total number of guests who brought chips.
24 / 3 = 8
8 guests brought drinks.
24 / 4 = 6
6 guests brought desserts.
6 + 8 = 14
24 - 14 = 10
10 guests brought chips.
Hope this helps!