18 bottles of juice
Step-by-step explanation:
Total number of people expected = 120
Each bottle contains 7 servings
Each person will have one serving
let the number of bottles needed = y
if 1 bottle contains 7 servings, 1 bottle will serve 7 persons
1 bottle = 7 people
y = 120 people
120(1) = 7(y)
120 = 7y
y = 120/7
y = 17.14
We do not have a whole number in our result and we need to account for each person.
To determine the right amount of bottles, we need to check our result by using 17 and 18
for 17 bottles, number of people = 17 (7) = 119
for 18 bottles, number people = 18 (7) = 126
119 is less than the number of people expected
126 is more than the number of people expected
18 bottles will account for each person
Hence, 18 bottles of juice will be needed to give each person one serving