Ronald and Tim both did their laundry today Ronald does laundry every 6 days and Tim does laundry every 9 days how many days will it be until Ronald and 10th both do their laundry on the same day again

When you have 25 numbers, and jake picks 3 random numbers and puts them back, what is the chance bob has of picking those 3 numbers when he picks 6 random numbers (without putting them back)? explain.