Question A database system assigns a32 -character ID to each record, where each character is either a number from0 to9 or a letter fromA toF .

Question

A database system assigns a 32

-character ID to each record, where each character is either a number from 0

 to 9

 or a letter from A

 to F

. Assume that each number or letter being selected is equally likely. Find the probability that at least 20

characters in the ID are numbers. Use Excel to find the probability.

• Round your answer to three decimal places.