Jimmy earned 20 * 3 = <<20*3=60>>60 points for the exams he wrote.
For bad behavior, he lost 5 points, so he has 60 – 5 = <<60-5=55>>55 points left.
To pass to the next class, Jimmy needs at least 50 points, so he can lose 55 – 50 = <<55-50=5>>5 more points.
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