Set A consists of the integers from 4 to 12, inclusive, while set B consists of the integers from 6 to 20, inclusive. How many distinct integers do belong to the both sets at the same time? A. 5 B. 7 C. 8 D. 9 E. 10

(B) Set A and set B are overlapping. To determine the number overlapping elements determine the points where the overlapping begins and ends: The sets begin to overlap at 6 and end at 12. There are 12 – (6 – 1) = 7 integers between 6 and 12 inclusive. The correct answer is B. --------- I understand that set A and set B are composed of 5, 6, 7, 8, 9, 10, 11 and 7, 8, 9, 10, 11 ... so on, respectively. So they are supposed to have 5 integers in common (7, 8, 9, 10, 11), aren't they? What do I miss?

Users browsing this forum: No registered users and 1 guest

You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot post attachments in this forum

GMAT(TM) and GMAT CAT (TM) are registered trademarks of the Graduate Management Admission Council(TM). The Graduate Management Admission Council(TM) does not endorse, nor is affiliated in any way with the owner or any content of this site.