Alberto, Benjamin and Carlota made a total of 20 sandwiches.

Benjamin did 3 times as much as Alberto, and Carlota did twice as much as Benjamin.

How many sandwiches did Alberto make?

a) 2

b) 4

c) 5

d) 6

e) 10

C : B : A = 6 : 3 : 1

20 / 10 = 2

Alberto made only 2 sandwiches.