Homework somone help me please?

1.On a quiz of 10 questions, every correct answer earns 5 points, but every rong answer deducts 2 points. Questions left blank earn 0 point. Tim got c questions correct, w questions wrong and left B questions blank. he earned a score of 31 points on the quiz. What is the order triple (c,w,b)?

2.Due to a bowling score of 204 in his last game, Remy raised his average from exactly 156 to 158. What score must eh bowl in the next game to raise his overall everage to exactly 159?

3. Of all four-digit positive integers contaning only digits from the set {2, 4, 6, 8} what fraction of them have at least one of their digits repeated? Exspress ur answer as a common fraction.