12 (C) 18 ty percent use neither an iPhone no

A First Course in Probability (10th Edition)
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ISBN:9780134753119
Author:Sheldon Ross
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Chapter1: Combinatorial Analysis
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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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CORRECTION: ITEM 26. Last sentence: How many students in this class are using an iPhone or an iPad?

 

answer only number 26, 27 and 28 and this questions are not graded

26. In a class of 60 students, sixty percent use neither an iPhone nor an iPad. Twenty percent use
an iPhone, while thirty percent use an iPad. How many students in this class are using both an
iPhone or an iPad?
(A) 6
(В) 12
(C) 18
(D) 24
27. In a class of 60 students, sixty percent use neither an iPhone nor an iPad. Twenty percent use
an iPhone, while thirty percent use an iPad. How many students in this class are using both an
iPhone and an iPad?
(A) 6
(В) 12
(C) 18
(D) 24
28. The compound proposition p→ q can be express as follows EXCEPT
(A) q is necessary for p
(C) a sufficient condition for q is p
(B) p only if
(D) p whenever q
29. q → p is called the
of p → q.
(A) contradiction
(C) inverse
(B) converse
(D) contrapositive
Transcribed Image Text:26. In a class of 60 students, sixty percent use neither an iPhone nor an iPad. Twenty percent use an iPhone, while thirty percent use an iPad. How many students in this class are using both an iPhone or an iPad? (A) 6 (В) 12 (C) 18 (D) 24 27. In a class of 60 students, sixty percent use neither an iPhone nor an iPad. Twenty percent use an iPhone, while thirty percent use an iPad. How many students in this class are using both an iPhone and an iPad? (A) 6 (В) 12 (C) 18 (D) 24 28. The compound proposition p→ q can be express as follows EXCEPT (A) q is necessary for p (C) a sufficient condition for q is p (B) p only if (D) p whenever q 29. q → p is called the of p → q. (A) contradiction (C) inverse (B) converse (D) contrapositive
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