There are six cards bearing numbers $2, 4, 5, 5, 5, 6.$ If two cards are randomly selected from the lot, what is the

There are six cards bearing numbers $2, 4, 5, 5, 5, 6.$ If two cards are randomly selected from the lot, what is the probability that the positive difference between the numbers on these cards is $3$ or less?

A. $\dfrac8{15}$

B. $\dfrac9{15}$

C. $\dfrac{10}{15}$

D. $\dfrac{12}{15}$

E. $\dfrac{14}{15}$

Answer: E

Source: GMAT Club Tests

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