Life expectancy is defined by the formula 2SB/G, where S = shoe size, B = average monthly electric bill in dollars, and G = GMAT score. If Melvin's GMAT score is twice his monthly electric bill, and his life expectancy is 40, what is his shoe size?	Choose one: A) 25 B) 30 C) 35 D) 40 E) 50
Solution -   Given that, G = 2B and Life expectancy(L) = 40   L=2SB/G -&gt; 40 = 2SB/2B --&gt; S=40.   ANS 40
<result>D</result>
Life expectancy is defined by the formula 2SB/G, where S = shoe size, B = average monthly electric bill in dollars, and G = GMAT score. If Melvin's GMAT score is twice his monthly electric bill, and his life expectancy is 40, what is his shoe size?