Adie of unknown bias is rolled 20 times, and the number 3 comes up 6 times. in the next three rounds (the die is rolled 20 times in each round), the number 3 comes up 6 times, then 5 times, and finally 7 times. which experimental probability is consistent with this simulation?

Let's right out the amount of times out of 20 the number 3 came out for all trials:
6/20 , 6/20, 5/20, 7/20
This probability averages at: 6/20 (6 + 6 + 5 + 7    /4 ) = 0.3

The normal probability to get one number is = 0.1666 recurring (1/6)

In relation to the normal probability the probability of getting a 3 on this die is almost double.
The experimental probability consistent with this simulation is: 6/20 (0.3)