How much should be added to each term of 4 : 7 so that it becomes 2 : 3?
Answer & explanation
Correct answer: option 3
A : B
4 : 7
Numbers that should be added to make it 2 : 3,
= \(\frac{4R\;+\;a}{7R\;+\;a}\) = \(\frac{2}{3}\)
= 12R + 3a = 14R + 2a
= a = 2R
Put R = 1
Therefore, a is 2.