Three girls searched for geodes in the desert corinne collected 11 1\8 pounds allen collected for 5 8 pounds and leandra collected 3 3/4 pounds how much more did corinne collect than the other two girls combined? a 2 1/2 pounds b 2 3/4 pounds c 2 7\8 d3 3\4?

Corine collected a total of 11 1/8 pounds of geodes.

Allen collected 5 1/8 pounds of geodes.
Leandra collected 3 3/4 pounds of geodes.

X = Allen + Leandra
X = 9/8 + 3 3/4
X = 9/8 + 15/4
X = (9 + 45) / 8
X = 54/8 = 2 2/8

= 11 1/8 - 8 2/8
= 10 9/8 - 8 2/8
= 2 7/8

So the answer is letter C. 2 7/8