SSC CPO 2019 PYQ — Question 127

SSC CPO Tier I - 11th December 2019 - Shift 2 • Quantitative Aptitude • Q127

The value of is (1 – k), where k = ?

Show answer & explanation

Correct answer: A

Explanation

The correct answer is Option 1 i.e. 0.666

Understanding Application
Tricks

Given

= 1 - k

Now

We can rewrite

⇒ [(4.669)2 - (2.331)2 / (4.669 + 2.331)2 ] = 1 - k

⇒ k = 1 - 2.338/7 

⇒ k = (7 - 2.338)/7 

⇒ k = 4.662/7 

⇒ k = 0.666