Question:

26) IN ONE REGION, 40% OF ALL RESIDENTIAL TELEPHONE NUMBERS

Last updated: 7/9/2022

26) IN ONE REGION, 40% OF ALL RESIDENTIAL TELEPHONE NUMBERS

26) IN ONE REGION, 40% OF ALL RESIDENTIAL TELEPHONE NUMBERS ARE UNLISTED. IF 5 RESIDENTIAL HOUSING UNITS ARE RANDOMLY SELECTED, FIND THE PROBABILITY THAT ALL OF THEM HAVE UNLISTED NUMBERS.