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22 Dec 2016, 02:24
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The figure shows a spinner with consecutive integers from 11 to 18 written on it. If Simone spins the pointer so that it has an equal likelihood of stopping on any number, what is the probability that the pointer will end up pointing to an integer with a prime units digit?
A. 1/3
B. 1/2
C. 3/8
D. 5/8
E. 2/3
Attachment:
image008.jpg [ 4.32 KiB | Viewed 2781 times ]
25 Dec 2016, 10:34
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Total number of integers from 11 to 18= 8
Total numbers integers with a prime units digit = 4 (12,13,15,17)
Probability= 4/8= 1/2
Ans (B)
Total numbers integers with a prime units digit = 4 (12,13,15,17)
Probability= 4/8= 1/2
Ans (B)
22 Jan 2017, 22:15
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ok i am bit confused here. Shouldnt 11 be a prime number as well in this case or 1 isnt considered prime for gmat questions
