GRE GMAT TESTs AND SOLUTIONs

Four persons enter the lift of a seven story building at the ground floor. In how many ways can they get out of lift on any floor other than ground floor A. 720 B. 1296 C. 1540 D. 1478 E. 360

A box contains either blue or red flags. The total number of flags in the box is an even number. A group of children are asked to pick up two flags each. If all the flags are used up in the process such that 60% of the children have blue flags, and 55% have red flags, what percentage of children have flags of both the colors? A) 5% B) 10% C) 15% D) 20% E) It can not be determined