CAT WhatsApp Group
Sign in
Please select an account to continue using cracku.in
↓ →
CAT WhatsApp Group
What number should be added to each of the numbers 103, 135, 110 and 144 so that the resulting numbers are in proportion?
Let say, x be the number.
So,
$$\frac{103+x}{135+x}=\frac{110+x}{144+x}\ $$
or, $$\left(103+x\right)\left(144+x\right)=\left(135+x\right)\left(110+x\right)\ $$
or, $$\left(103x+x^2+144x+14832\right)=\left(135x+x^2+110x+14850\right)\ $$
or, $$\left(247x+14832\right)=\left(245x+14850\right)\ $$
or, $$2x=18\ .$$
or, $$x=9\ .$$
C is correct choice.
Create a FREE account and get:
