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If a number is chosen at random from the set {1, 2, 3, ...., 100}, then the probability that the chosen number is a perfect cube is -.

  • A.1/25
  • B.1/2
  • C.4/13
  • D.1/10

Answer: A

The perfect cubes up to 100 are

\[ 1^{3} = 1,\quad 2^{3} = 8,\quad 3^{3} = 27,\quad 4^{3} = 64 \]

since \( 5^{3} = 125 \) is already too large.

\[ P = \frac{4}{100} = \frac{1}{25} \]

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