Question
An army lost 20% its men in war, 20% of the remaining
due to diseases and 20% of the rest were disabled. Thus, the strength was reduced to 64,000 active men. Find the original strength.Solution
Let the original strength of men in army = x Then, lost in war Rest men = x - (20 × x)/100 = 4x/5 Now, loss of men due to disease, rest men = 4x/5 - 4x/5 × 20/100 = (16 x)/25 Now, after disabled, rest men = (16 x)/25 - (16 x)/25 × 20/100 = (64 x)/125 Now, according to the question, (64 x)/125 = 64,000 x = 1,25,000
What is a page fault?
A relation is in 2NF if:
Phantom Reads occur when:
Which of the following is true about the primary key in a relational database?
When debugging a recursive function that processes a `Tree` data structure, what is a common strategy to identify infinite recursion or incorrect base c...
Multiversion Concurrency Control (MVCC) ensures:
In the context of computer networks, what is the primary function of a router?
Shadow paging in recovery eliminates the need for:
In paging, the page size is defined by:
In PL/SQL, a `CURSOR` is used to:
