If p : q = 4 : 5, q : r = 3 : 4 and r : s = 2 : 5, then p : s is:
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 6 : 25.
Given that
If p : q = 4 : 5, q : r = 3 : 4 and r : s = 2 : 5
p/q = 4/5,
q/r = 3/4,
r/s = 2/5
So, p/s = p/q × q/r × r/s = 4/5 × 3/4 × 2/5 = 6/25
Hence, the value of p : s = 6 : 25