ASVAB (Armed Services Vocational Aptitude Battery)Arithmetic Reasoning (AR)Medium
A military convoy consists of 20 vehicles. If 35% of the vehicles are armored personnel carriers (APCs) and the rest are supply trucks, how many supply trucks are in the convoy?
- A7
- B15
- C13
- D10
Show answer & explanationAnswer & explanation
Correct answer: C. 13
First, find the number of APCs: 35% of 20 = 0.35 * 20 = 7 APCs. Then, subtract the number of APCs from the total number of vehicles to find the number of supply trucks: 20 - 7 = 13 supply trucks.
Why the other options are wrong
- A. This is the number of APCs, not supply trucks.
- B. Incorrect calculation, possibly rounding or misinterpreting the percentage.
- D. Incorrect calculation of percentage or subtraction mistake.
Percentage Word Problems
Problems that involve calculating a specific percentage of a given number, or finding a number based on a percentage.
- Convert percentages to decimals (e.g., 35% = 0.35) for calculations.
- To find 'X% of Y', calculate (X/100) * Y.
- Often involves multiple steps, such as finding a part and then the remainder.
Memory trick: Percent Parts: Find one part, subtract from total for the rest.