Question

Albert has two types of shirts in his wardrobe - long sleeved and short sleeved. The number of long sleeved shirts ' l ' he has is one more than twice the number of short sleeved shirts,' s '. If he has a total of 40 shirts in his wardrobe, how many short sleeved shirts does he have?

• A. 11
• B. 13
• C. 17
• D. 21

Answer 1

The correct option is C 17

Recognize the variables : l and s
Decipher the relation b/w the variables :
1. Long sleeved is one more than twice the number of short sleeved shirts : l = 1 + 2s , which can be re-written as l - 2s = 1.....(i)
2. He has total of 40 shirts : l + s = 40.......(ii)
Now, that you have two equations, solve them using elimination method (or even substituiton method )to get the required values.
Subtracting equation (i) from equation (ii), we get
3s = 39
Therefore l = 27, s = 13.
Thus, the correct the answer is 13.