📅 NSB 2017🎓 HS🔄 Round 5#️⃣ Q22🌟 BONUS✍️ Short Answer
For real numbers a and b, define the binary operation "star" by a “star” b is equal to one less than the average of a and b. What is 3 “star” (4 “star” 5)?
✔️Answer:9/4
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