40% of Ram's marks is equal to 20% of Rahim's marks which percent is equal to 30% of Robert's marks. If Robert's marks is 80, then find the average marks of Ram and Rahim?	Choose the correct choice from the following answers:
A) 87	B) 87	C) 87	D) 90	E) 77
Given, 40% of Ram's marks = 20% of Rahim's marks = 30% of Robert's marks.   Given, marks of Robert = 80   30% of 80 = 30/100 * 8 = 24   Given, 40% of Ram's marks = 24.   =&gt; Ram's marks = (24 * 100)/40= 
<gadget id="calculator">(24 * 100)/40</gadget>
<output>60</output>
60   Also, 20% of Rahim's marks= 24   =&gt; Rahim's marks = (24 * 100)/20= 
<gadget id="calculator">(24 * 100)/20</gadget>
<output>120</output>
120   Average marks of Ram and Rahim= (60 + 120)/2= 
<gadget id="calculator">(60 + 120)/2</gadget>
<output>90</output>
90.   Answer: 90
<result>D</result>
40% of Ram's marks is equal to 20% of Rahim's marks which percent is equal to 30% of Robert's marks. If Robert's marks is 80, then find the average marks of Ram and Rahim?