If p : q = 4 : 1, find (5p + 3q) : (5p - 3q)
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 23 : 17.
Let p = 4k and q = k
(5p + 3q) : (5p – 3q)
= (5 × 4k + 3 × k) : (5 × 4k – 3 × k)
= (20k + 3k) : (20k – 3k)
= 23k : 17k
= 23 : 17