Peter makes six cakes of 5 lb each three chocolate cakes and three vanilla cakes to serve at a party for 120 people. How many ounces of cake will each guest have? If the guest list increases to 150 guests, how many more cakes does Peter need to make?

5lb per cake * 6 cakes = 30lb

30lb / 120 people = 0.25lb per person

150 people - 120 people = 30 people

0.25lb per person * 30 people = 7.5lb

5lb___1 cake

7.5lb___X=1.5 cakes

(7.5lb * 1 cake) / 5lb = 1.5 cakes

4 oz 2 cakes

Step-by-step explanation:

Since 6 cakes serve 120 people, each cake serves 120/6 = 20 people. Each cake weighs (5 lb) (16 oz/lb) = 80 oz. Then each person gets ...

(80 oz) / (20 persons) = 4 oz/person

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150 servings will require 150/20 = 7.5 cakes. Peter already has 6 cakes, so needs to make 2 more.