Question
Seven balls out of which 4 are red and the rest are green
are to be arranged in a row. Find the number of arrangements in which all four red balls are not placed together.Solution
Total number of ways of arrangement = 7! = 5040 ways
If we consider 4 red balls as one item, number of arrangements among themselves = 4! = 24 ways
Number of arrangements of remaining 4 items = 4! = 24 ways
Therefore, required number of ways = 5040 – (24 × 24) = 4464 ways
- This question consists of a sentence which is divided into four parts numbered (1) to (4). Only one part of the sentence is not acceptable in standard writ...
Higher attrition have been leading to (1)/better increments as (2)/the job market is currently witnessing (3)/a huge churn, according to Naukri (4).
Select the alternative that will improve the bold part of the sentence in case there is no improvement select “No improvement”.
Some people l...
If the Government refuses to introduce (A)/changes now, it will be (B)/demonstrating its contempt for (C)/democracy, public concern and animal welfare (...
In my opinion (A)/a pencil is always (B)/ more preferable to a pen.(C)/ No error (D)
Parts of the following sentence are given as options. Identify the segment that contains a grammatical error.Â
I am sorry I haven’t learnt the...
Many firms fail because when they begin (1)/ exporting, they have not research the (2)/ target markets or have not planned enough. (3)/ No error (4)
The shift towards contactless is not only (A)/ an attempt to drive adoption, but to (B)/ remove legacy challenges that had constrained (C)/ growth such ...
At the heart of the/ conflict is the government’s/ mission to capture or killing the/ leader of the terrorist group.
...The soldiers, who had (A)/so lately been employed in (B)/interring their victims, were now (C)/called at to bury their own dead (D).
