Final answer:
To generate a random integer in the range 10 to 15, use the formula 'randGen.nextInt(6) + 10'.
Step-by-step explanation:
To generate a random integer in the range 10 to 15, you can use the formula 'randGen.nextInt(6) + 10'. The 'nextInt(6)' generates a random number between 0 and 5, and then adding 10 to it ensures that the final result is between 10 and 15.