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You roll a number cube numbered from 1 to 6. What is the probability that the number is a composite number?

Respuesta :

For the six numbers in the cube, we have.

  • 1 is not prime nor composite
  • 2 is prime
  • 3 is prime
  • 4 is composite, because it can be written as [tex]2\cdot 2[/tex]
  • 5 is prime
  • 6 is composite, because it can be writte as [tex]2\cdot 3[/tex]

So, only two of the numbers in the cube are composite. This means that you have a chance of

[tex]\dfrac{2}{6}=\dfrac{1}{3}[/tex] of rolling one of them.

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