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 60, what is his shoe size?  Choose the correct option
A) 25 B) 60 C) 35 D) 40 E) 50
Solution -   Given that, G = 2B and Life expectancy(L) = 60   L=2SB/G -&gt; 60 = 2SB/2B --&gt; S=60.   ANS 60
<result>B</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 60, what is his shoe size?