A certain number is divided into two parts such that 5 times the first part added to 11 times the second part makes 7 times the whole. The ratio of the first part to the second part is
Let the number be x and divided into 'a' and 'x-a'
According to the given question,
5a + 11(x - a) = 7x
5a + 11x - 11a = 7x
4x = 6a (or) x = (3/2)a ........(1)
Ratio between first part and second part,
a : $$\frac{3}{2}$$a - a
a : a($$\frac{3}{2}$$ - 1)
a : a($$\frac{1}{2}$$)
2:1
Hence, option A is the correct answer.
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