If x/2 = y/5 = z/6, then (x + y + z)/x is equal to : Choose the correct choice:
A) 13  B) 12  C) 15/2  D) 13/2  E) None of these
Explanation :   Solution: Let x/2 = y/5 = z/6 = k =&gt; x =2k, y =5k, z = 6k.   .'. (x + y + z)/x = (2k + 5k + 6k)/2k   =&gt; 13k/2k = 13/2   Answer : 13/2
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If x/2 = y/5 = z/6, then (x + y + z)/x is equal to :