Question: John's math course requires 5 tests. His first 4 grades were 68, 65, 92, and 67. To end up with an average score of at

John's math course requires 5 tests. His first 4 grades were 68, 65, 92, and 67. To end up with an average score of at least 74.6, what is the lowest score John will need on the fifth test?

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