Selecting From Identical Objects | GMAT Permutation and Probability | GMAT Sample Questions

GMAT Preparation Online | Permutation Combination Sample Question | Permutation & Probability - Selecting From Identical Objects | Problem Solving Practice

This problem solving question is a part of the free online GMAT prep series by Wizako.

Question
There are 4 identical pens and 7 identical books. In how many ways can a person select at least one object from this set ?

A. 12
B. (2^4 - 1) (2^7 - 1)
C. 11
D. 2^11 -1
E. 39


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