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If a value for the integer x is randomly selected and −10 < x < 10

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If a value for the integer x is randomly selected and −10 < x < 10  [#permalink]

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New post 04 Mar 2019, 00:16
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A
B
C
D
E

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  15% (low)

Question Stats:

84% (01:11) correct 16% (00:49) wrong based on 37 sessions

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If a value for the integer x is randomly selected and −10 < x < 10, what is the probability that x is even?

A. 1/19
B. 1/4
C. 1/2
D. 9/19
E. 11/21

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Re: If a value for the integer x is randomly selected and −10 < x < 10  [#permalink]

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New post 04 Mar 2019, 00:27

Solution



Given:
    • The value of x lies in the given range: -10 < x < 10

To find:
    • If a value of x is chosen from the given range, the what is the probability that x is even

Approach and Working:
Number of possible values of x in the given range = 19 (-9 to -1: 9 values, 0, 1 to 9: 9 values)
Number of even values in the given range = 9
    • Therefore, the probability that x is even = 9/19

Hence, the correct answer is option D.

Answer: D

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Re: If a value for the integer x is randomly selected and −10 < x < 10  [#permalink]

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New post 04 Mar 2019, 01:13
Bunuel wrote:
If a value for the integer x is randomly selected and −10 < x < 10, what is the probability that x is even?

A. 1/19
B. 1/4
C. 1/2
D. 9/19
E. 11/21



total integers -10<x<10 = 19
and even -8,-6,-4,-2,0,2,4,6,8 = 9 integers
x is even = 9/19
IMO D

thing to note ; 0 is even integer ..
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Re: If a value for the integer x is randomly selected and −10 < x < 10   [#permalink] 04 Mar 2019, 01:13
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