MathDB

2014 Guts #4: Choosing Divisors

Source:

February 25, 2014

probabilityexpected value

Problem Statement

[4] Let

D

be the set of divisors of

100

. Let

Z

be the set of integers between

1

and

100

, inclusive. Mark chooses an element

d

of

D

and an element

z

of

Z

uniformly at random. What is the probability that

d

divides

z

?

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