JKSSB Written 2026
Answer & Explanation
Click "Check Answer" to reveal
Correct Answer:
Option C —
2:3
To solve this, we can use the concept of a weighted average or a simple method called Alligation, which is used to find the ratio in which two groups are mixed to reach a specific average.Step-by-Step Explanation
Identify the individual averages:
The first group has an average of 15.
The second group has an average of 20.
Identify the combined average:
The average of both groups combined is 18.
Calculate the differences:
Find the difference between the higher average (20) and the combined average (18): 20 minus 18 equals 2.
Find the difference between the combined average (18) and the lower average (15): 18 minus 15 equals 3.
Determine the ratio:
The ratio of the quantities (x to y) is inversely proportional to these differences.
The difference from the "y" side (which was 2) corresponds to the value of x.
The difference from the "x" side (which was 3) corresponds to the value of y.
This gives us the ratio of 2 to 3.
Logic Check
If you have more of the "20" group than the "15" group, the final average will be closer to 20. Since 18 is slightly closer to 20 than it is to 15, it makes sense that the "y" portion (the 20s) must be larger than the "x" portion (the 15s). A ratio of 2 to 3 confirms that there is more of "y" than "x."
Answer verified by Quintessence Classes faculty — Karan Nagar, Srinagar.