Final answer:
Based on the given information, no pitches were thrown with three strikes.
Step-by-step explanation:
To find the number of pitches thrown with three strikes, we need to subtract the total number of pitches thrown with no strikes, one strike, and two strikes from the total number of pitches thrown.
Total number of pitches thrown = 3103
Pitches thrown with no strikes = 1286
Pitches thrown with one strike = 946
Pitches thrown with two strikes = 871
Pitches thrown with three strikes = Total number of pitches thrown - Pitches thrown with no strikes - Pitches thrown with one strike - Pitches thrown with two strikes
Pitches thrown with three strikes = 3103 - 1286 - 946 - 871 = 0
Therefore, no pitches were thrown with three strikes.