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b) A factor of 30 is chosen at random.
What is the probability, as a decimal, that it is a 2-digit number?
2.5
Calculating Probabilities
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Answer:

0.375

Step-by-step explanation:

Listing the factors of 30

1, 2, 3, 5, 6, 10, 15, 30 ← that is 8 factors

There are 3,  2- digit factors, that is 10, 15, 30

Thus the probability of choosing a 2- digit number factor is

[tex]\frac{3}{8}[/tex] = 0.375

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