the average weight of a class of 24 students is 35 kg. if the weight of the teacher be included, the average rises by 400 g. the weight of the teacher is:	Choose one
A) 45  B) 46  C) 47  D) 48  E) 49
<gadget id="calculator">400 / 1_000</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">35 + (2/5)</gadget>
<output>177/5 = around 35.4</output>

<gadget id="calculator">24 + 1</gadget>
<output>25</output>

<gadget id="calculator">(177/5) * 25</gadget>
<output>885</output>

<gadget id="calculator">24 * 35</gadget>
<output>840</output>

<gadget id="calculator">885 - 840</gadget>
<output>45</output>

<result>A</result>
the average weight of a class of 24 students is 35 kg. if the weight of the teacher be included, the average rises by 400 g. the weight of the teacher is:
subtract(multiply(add(35, divide(400, const_1000)), add(24, const_1)), multiply(24, 35))
weight of the teacher = ( 35.4 x 25 - 35 x 24 ) kg = 45 kg . answer : a