There are 33 students in Class 51. In a math test, 3 students failed to take the test due to illness. Later, the teacher gave these three students make-up exams, and the scores they got were 78, 87 and 93 respectively. After recalculation, the average score of all students in this class in the mathematics test is 76 points. So, what is the average score of the first 30 students?
五1班有学生33名，他们在一次数学考试中，3名学生因病未能参加考试．后来老师给这3名学生补考，结果他们所得的分数分别是78分、87分和93分．经重新计算后，这个班全体学生在数学考试中的平均分是76分．那么，最初30名学生的平均分是多少分．
<gadget id="calculator">76 * 33</gadget>
<output>2_508</output>

<gadget id="calculator">2_508 - 78 - 87 - 93</gadget>
<output>2_250</output>

<gadget id="calculator">2_250 / 30</gadget>
<output>75</output>

<result>75</result>