ax + 2y = 6
bx + cy = 9
have infinte solutions, means that both equations are identical
his implies that a/b = 6/9 = 2/3
or b = 1.5a
so we have to find value of 2.5a
Statement 1- gives us value of c which 3/2*2 - no extra information
hence insufficient
Statement 2 - gives us another relation between a and b
if b = a+1 and b = 1.5 a
means a = 0.5
hence a+b = 1.25
sufficient
answer is B
+1 kudos if you like the post.
bx + cy = 9
have infinte solutions, means that both equations are identical
his implies that a/b = 6/9 = 2/3
or b = 1.5a
so we have to find value of 2.5a
Statement 1- gives us value of c which 3/2*2 - no extra information
hence insufficient
Statement 2 - gives us another relation between a and b
if b = a+1 and b = 1.5 a
means a = 0.5
hence a+b = 1.25
sufficient
answer is B
+1 kudos if you like the post.
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