If the product of two numbers is 5 and one of the number is 3/2 , then sum of two numbers is :

Answer: Option C

Let two numbers be a and b
Given ab = 5 and a = $$\frac{3}{2}$$
$$\begin{array}{rl}& \Rightarrow b=\frac{5}{a}\\ & \Rightarrow b=\frac{5}{\frac{3}{2}}\\ & \Rightarrow b=\frac{5\times 2}{3}\\ & \Rightarrow b=\frac{10}{3}\end{array}$$
Required sum of :
⇒ a + b = $$\frac{3}{2}$$ + $$\frac{10}{3}$$
L.C.M. of 2 and 3 = 6
⇒ a + b = $$\frac{9+20}{6}$$
⇒ a + b = $$\frac{29}{6}$$
⇒ a + b = $$4\frac{5}{6}$$