Study the given table and answer the question that follows.
The table shows the total number of batteries sold by a company (in lakhs) over the years.
If ===, then find the value of k.
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 15.
Let a/2 = b/3 = c/4 = (2a - 3b + 5c)/k = r
So, a = 2r, b = 3r, c = 4r
Now, (2a - 3b + 5c)/k = r
⇒ [2(2r) - 3(3r) + 5(4r)]/k = r
⇒ (4r - 9r + 20r)/k = r
⇒ 15r/k = r
⇒ k = 15