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Rodney uses the following clues to try to guess a secret number:

$$\begin{tabular}{ c } It is a two-digit integer. he tens digit is odd. The units digit is even. The number is greater than 65. \end{tabular}$$

If Rodney guesses a number that has each of these properties, what is the probability that Rodney will guess the correct number? Express your answer as a common fraction.

Logic  Nov 2, 2018

#1
+2786
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It's not hard to just list these out.

70, 72, 74, 76, 78, 90, 92, 94, 96, 98

so 10 in total.

Thus P[guessing correctly] = 1/10

Rom  Nov 2, 2018
#1
+2786
+1

It's not hard to just list these out.

70, 72, 74, 76, 78, 90, 92, 94, 96, 98

so 10 in total.

Thus P[guessing correctly] = 1/10

Rom  Nov 2, 2018