Andrew Geller

Andrew Geller is a top GMAT tutor based out of New York City. Throughout his career he has successfully taught people from many different backgrounds, countries, and starting scores.

From a group of 8 volunteers, including Andrew and Karen, 4 people are to be selected at random to organize a charity event. What is the probability that Andrew will be among the 4 volunteers selected and Karen will not?

(A) 3/7 (B) 5/12 (C) 27/70 (D) 2/7 (E) 9/35 Additional GMAT Combinatorics/Grouping Practice Questions Here’s another grouping question from the GMAT Official Guide: A researcher plans to identify each participant in an experiment And another grouping question from GMAT Question of the day Learn more about GMAT tutoring with Atlantic  

From a group of 8 volunteers, including Andrew and Karen, 4 people are to be selected at random to organize a charity event. What is the probability that Andrew will be among the 4 volunteers selected and Karen will not? Read the Full Article »