You use a random number generator that produces the digits 1 through 9 with equal probability. You draw four digits and make them into a number; for example, 0, 2, 4, 4 would be the number 0244 or just 244. What is the probability of getting a number strictly greater than 1000?
A) 1/10
B) 1001/10,000
C) 1000/9999
D) None of the above.

Question

Quizplus · Accepted Answer

Since the random number generator produces digits 1 through 9 (excluding 0 for the first digit to make a number strictly greater than 1000), the first digit can be any from 1 to 9, and the subsequent digits can be any from 1 to 9 as well, making every draw greater than 1000 automatically. Therefore, the probability is 1 (or 100%), which is not listed among the options provided.

You Use a Random Number Generator That Produces the Digits