There are 79 students in the Travel Club. They discovered that 30 members have visited country A, 35 have visited country B, 34 have been to country C, 9 have visited countries A and B, 16 have been only to country C, and 17 have been only to country A. Some club members have not been to any of the three foreign countries, and, curiously, an equal number have been to all three countries. (a) How many students have been to all three countries? (b) How many students have been only to country B?
There are 79 students in the Travel Club. They discovered that 30 members have visited country A, 35 have visited country B, 34 have been to country C, 9 have visited countries A and B, 16 have been only to country C, and 17 have been only to country A. Some club members have not been to any of the three foreign countries, and, curiously, an equal number have been to all three countries. (a) How many students have been to all three countries? (b) How many students have been only to country B?
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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There are 79 students in the Travel Club. They discovered that
30 members have visited country A, 35 have visited country B, 34 have been to country C, 9 have visited countries A and B, 16
have been only to country C, and 17 have been only to country A. Some club members have not been to any of the three foreign countries, and, curiously, an equal number have been to all three countries.(a) How many students have been to all three countries?
(b) How many students have been only to country B?
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