NguyenTrucGiang NguyenTrucGiang
  • 08-08-2021
  • Mathematics
contestada

Roll a dice six times. Find the probability that :
a . The back of the dot appears exactly 4 times ;

Respuesta :

SalenaMd
SalenaMd SalenaMd
  • 08-08-2021

Answer:

2/3???

.................

Answer Link
cwrw238 cwrw238
  • 08-08-2021

Answer:

0.804% to 3 dec places.

Step-by-step explanation:

If the first 4 throws are a dot and the next 2 are not:

Probability = (1/6)^4 * (5/6)^2

=  25/46656

There are 6C4 ways for this to happen

6C4 = (6*5*4*3)/ (4*3*2*1) = 15 ways.

So The required probability = (25*15)/46656

= 125/15552

= 0.00804

= 0.804%

Answer Link

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