A computer’s random number generator produces random integers from 1 to 50 What is the probability that at least one of the first 4 generated numbers is in the 20 s?

There are 10 integers in the 20s (20 through 29) out of 50, so the probability one number is not in the 20s is 40/50 = 0.8. The probability all 4 numbers are not in the 20s is 0.8⁴ = 0.4096. Therefore, the probability at least one is in the 20s is 1 − 0.4096 = 0.5904, choice C.

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