Helen is copying a printed reproduction of the Mona Lisa. The print is 24 in. wide and 36 in tall. If Helen's canvas is 12 in, wide, how tall should her canvas be

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.