GAUSS8 2020 Problem 19

Past Contests GAUSS8 2020
1

X is 20 \% of 50 . 40 is 20 \% of Y. 40 is Z \% of 50 . What does X+Y+Z equal?

Answer Choices
A. 218
B. 335
C. 98
D. 290
E. 380