what is the average ( arithmetic mean ) of 10, 2030, 4050, 6070, 8090?	Choose the correct choice from the following:
A) 90 B) 95 C) 70 D) 85 E) 50
<gadget id="calculator">10 + 2_030</gadget>
<output>2_040</output>

<gadget id="calculator">2_040 + 4_050</gadget>
<output>6_090</output>

<gadget id="calculator">6_090 + 6_070</gadget>
<output>12_160</output>

<gadget id="calculator">12_160 + 8_090</gadget>
<output>20_250</output>

<gadget id="calculator">4 + 1</gadget>
<output>5</output>

<gadget id="calculator">20_250 / 5</gadget>
<output>4_050</output>

<gadget id="calculator">100 * 10</gadget>
<output>1_000</output>

<gadget id="calculator">1_000 * 4</gadget>
<output>4_000</output>

<gadget id="calculator">4_050 - 4_000</gadget>
<output>50</output>

<result>E</result>
what is the average ( arithmetic mean ) of 10, 2030, 4050, 6070, 8090?
subtract(divide(add(add(add(add(10, 2030), 4050), 6070), 8090), add(const_4, const_1)), multiply(multiply(const_100, const_10), const_4))
so addition of all term - 10 , 20 , 30 , . . . . . . . 90 so average = ( 10 + 20 + 30 + 40 + 50 + 60 + 70 + 80 + 90 ) / 9 = ( 450 ) / 9 = 50 hence , the correct answer is e .