SOLUTION: A box contains 10 two-inch screws, of which 4 have a Phillips head and 6 have a regular head. Suppose that you select 3 screws randomly from the box. What is the probability that t

Total screws: 10

Total Philips screws: 4

Total regular screws: 6

P(1 Philips screw) = , or 



With replacement, 

P(2 Philips screws) = , or , or 



With replacement, 

P(3 Philips screws) = , or , or 

The probability that you will get MORE THAN 1 (meaning 2 or 3 Philips screws) = P(2P or 3P), or , or , or