An unbiased die with face marked 1, 2, 3, 4, 5, 6 is rolled four times. Out of 4 face values obtained, find the probability that the minimum face value is not less than 2 and the maximum face value is not greater than 5.
Favourable points are 2,3,4,5
Therefore, Probability=
Since the die is rolled 4 times
∴ Required probability