A number is to be selected at random from the set above. What is the probability that the number selected will be a solu

$\{-10, -6, -5, -4, -2.5, -1, 0, 2.5, 4, 6, 7, 10\}$

A number is to be selected at random from the set above. What is the probability that the number selected will be a solution of the equation $(x-5)(x+10)(2x-5)=0?$

A. $\dfrac1{12}$

B. $\dfrac16$

C. $\dfrac14$

D. $\dfrac13$

E. $\dfrac12$

Answer: B

Source: GMAT Prep

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