Bunuel wrote:
A certain firm has 28 lawyers in three states. These lawyers have license either in only one state or all three states. If 10 have license in state X, 11 have license in Y, 13 have license in Z. How many lawyers have license only in state Z ?
A. 3
B. 6
C. 10
D. 11
E. 13
X = Only x + All
Y = Only y + All
Z = Only z + All
X+Y+Z=Only x + All +Only y + All + Only z + All
10+11+13=(Only x +Only y + Only z + All) + 2*All
34=28+2*All
All=3
So only z=Z-All=13-3=10
Statistics : Posted by chetan2u • on 22 Jan 2022, 11:24 • Replies 2 • Views 1328
