I forgot the last digit of a 7-digit telephone number. If 1 randomly dial the final 3 digits after correctly dialing the first four, then what is the chance of dialing the correct number?
A. 1/999
B. 1/1001
C. 4/1000
D. 1/1000
Answer:D
I forgot the last digit of a 7-digit telephone number. If 1 randomly dial the final 3 digits after correctly dialing the first four, then what is the chance of dialing the correct number?
A. 1/999 B. 1/1001 C. 4/1000 D. 1/1000