The bone is thrown five times. Determine the probability that the number 6 dropped out twice.

The probability that the number 6 dropped on one roll is p = 1/6.
The probability that the number 6 did not fall out:
q = 1 – p = 1 – 1/6 = 5/6;
According to Bernoulli’s formula, the probability is. that the number 6 will be dropped twice in 5 trials:
P6 (2) = C (5,2) p ^ 2 q ^ 3 = 10 (1/6) ^ 2 (5/6) ^ 3 = 0.161.
C (5,2) = 5! / (2! 3!) = 4 5/2 = 10;
Answer: 0.161.