Computers manufactured by a certain company have a serial number consisting of a letter of the alphabet followed by a six-digit number. If all the serial numbers of this type have been used, how many sets have already been manufactured?

26,000,000 sets.

Explanation:

Computers are electronic devices used to perform computing task. They are also used as information technology system to communicate in a network. It comes with two sets of hard codes number, they are Mac address and serial number.

The serial number is used to specify a particular system model for part replacement, holds company information and the details of the system.

If the serial number has one alphabet and six number digits, each alphabet at the exhaustion of the six digit, evaluates to 1 million sets. There are 26 alphabets, so for all 26 alphabets, 26 million set of computers is produced.

the answer is c