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Ben bowled 156 and 203 in his first two games. What must he bowl in his third game to have an average of at least 170​?

User Qstebom
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(156 + 203 + x)/(3) \geqslant 170 \\ 156 + 203 + x \geqslant 510 \\ 359 + x \geqslant 510 \\ x \geqslant 151
User Armagedescu
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