Probability

Step 1: Total number of balls.
There are 10 balls in total, one of which is blue.
Step 2: Number of balls selected.
We are selecting 6 balls out of 10 randomly.
Step 3: Probability calculation.
The probability of selecting the blue ball can be found using the formula: The number of favorable outcomes is the number of ways to select 5 balls from the remaining 9 balls, which is .
The total number of possible outcomes is the number of ways to select 6 balls from 10, which is .
Thus, the probability is: Final Answer: