There are 50 students in Class 4. In a math test, the average score of the top 15 students is 7 points higher than the average score of the whole class, then how much lower the average score of the remaining 35 students is than the average score of the whole class.
四1班有50人，一次数学测验，前15名同学的平均分比全班平均分高7分，那么其余35名同学的平均分比全班的平均分低多少分．
<gadget id="calculator">7 * 15</gadget>
<output>105</output>

<gadget id="calculator">50 - 15</gadget>
<output>35</output>

<gadget id="calculator">105 / 35</gadget>
<output>3</output>

<result>3</result>