Computer voice recognition software is getting better. Some companies claim that their software correctly recognizes 98% of all words spoken by a trained user.
The program recognizes words (or not) independently. To simulate the program's performance on 10 words, use two digits to simulate one word with 02 to 99 meaning "correct" and these random digits:

The number of words correct out of the 10 is
A)10.
B)9
C)8
D)2
E) 1.

Question

Computer voice recognition software is getting better. Some companies claim that their software correctly recognizes 98% of all words spoken by a trained user.
The program recognizes words (or not) independently. To simulate the program's performance on 10 words, use two digits to simulate one word with 02 to 99 meaning "correct" and these random digits:

The number of words correct out of the 10 is
A)10. 
B)9 
C)8 
D)2 
E) 1.

Quizplus · Accepted Answer

To simulate the program's performance recognizing 10 words, we need to convert each word into a two-digit code. Since the software claims to have a correct recognition rate of 98%, we can assume that for every ten words spoken by a trained user, on average, only one word is incorrect. Therefore, out of the ten simulated words, we can expect only one to be incorrect, resulting in nine correctly recognized words. Looking at the options, choice B is the only one that matches this expectation.

Computer Voice Recognition Software Is Getting Better