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13 Nov 2018, 10:44
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B
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
45%
(medium)
Question Stats:
65% (01:34) correct
35%
(01:50)
wrong
based on 336
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In a class of 30 students, there are 17 girls and 13 boys. Five are A students, and three of these students are girls. If a student is chosen at random, what is the probability of choosing a girl or an A student?
A. 17/180
B. 19/30
C. 11/15
D. 14/15
E. None of the above.
A. 17/180
B. 19/30
C. 11/15
D. 14/15
E. None of the above.
13 Nov 2018, 10:52
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Probability of choosing girl = 17/30
Probability of choosing an A student = 5/30
So, probability of choosing a girl or an A student = (17/30) + (5/30) = 22/30 = 11/15
Option C
Probability of choosing an A student = 5/30
So, probability of choosing a girl or an A student = (17/30) + (5/30) = 22/30 = 11/15
Option C
13 Nov 2018, 17:52
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I thought it would be B because we need to minus 3/30 probably that's both girl and A student
