Question

Rohan spends x daily and saves y per week. What is his income in 3 weeks?

• A. $(21x+3y)$
• B. $(3x+9y)$
• C. $(21x+9y)$
• D. $(7x+3y)$

Answer 1

The correct option is A $(21x+3y)$

Amount of money spend in 1 day = x
So, amount of money spend in 7 days = (7x)
$\Rightarrow$ Amount of money spend in 1 week = (7x)
Amount of money saved in 1 week = y
$\therefore$ Income in 1 week = (7x + y)
So, income in 3 weeks = [3 x (7x + y)]
= (21x + 3y)