jacemartinhudl jacemartinhudl
  • 17-02-2020
  • Mathematics
contestada

PIUWawilities
robability of
a rolls of a
A number cube with six sides is rolled seven
times. The probability of getting a 4 exactly twice
DONE

Respuesta :

PollyP52 PollyP52
  • 17-02-2020

Answer:

23.44%

Step-by-step explanation:

The probability of getting a 4 on the first 2 throws and different numbers on the last 5 throws = 1/6 * 1/6 * (5/6)^5

= 0.01116

There are 7C2 ways of the  2 4's  being in different positions

= 7*6 / 2 = 21 ways.

So the required probability =  0.01116 * 21

= 0.2344 or 23.44%.

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