SOLUTION: In a lottery, 10 Ping-Pong balls (each with a digit 0-9) are placed in hopper. One ball is selected and that digit goes in first place. That ball is NOT put back in the hopper and

Question 981097: In a lottery, 10 Ping-Pong balls (each with a digit 0-9) are placed in hopper. One ball is selected and that digit goes in first place. That ball is NOT put back in the hopper and the process is repeated 3 more times. What is the probability of picking the winning 4-digit number?
Thanks in advance!
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
Probability of first is (1/10)
second is (1/9)
Third is (1/8)
Fourth is (1/7)
The joint probability is their product, or 1/5040.
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