What exactly is the concept of derangement in pnc? Can someone please explain it?
If n distinct items are arranged in a row, then the number of ways they can be rearranged such that none of them occupies its original position is,
n! [ (1/ 0!) -(1 /1!) +(1 /2!) -(1 /3!) +⋯+(−1) ^n (1/ n!) ]
I am pretty decent at solving LR questions but while i try to ,solve LR questions in an Aimcat,hilta hi nahi hai question,I just get stuck and just stare at the data ,wasting my time ...Can practising these questions actually overcome this?Or should I just spend more time on DI's instead?
IF ABCD = 20 ...Find how many positive integral solutions exist for a,b,c,d
A trader cheats both his supplier and customer by using false weights. while buying from his suppliers, he takes 10% more than the indicated weight. when he sells to his customer, he gives the customer a weight such that if 10% of that is added to the weight, the weight claimed by the trader is obtained. if he charges the cost price of the weight that he claims, find his profit %. ?
Find the number of integral solutions for the inequality (| x − 1| − 4) (| x + 2| − 5)
How to tackle these type of questions
find the remainder when 7!^6!^17777 is divided by 17?
Two Alloys of Iron have different %age of iron in them. The first of them weighs 6kgs and the second one weighs 12kgs. One piece each of equal weight was cut off from both the alloys. The piece from first was alloyed with the reamining second alloy and the piece from second was alloyed with the remaining first part alloy. As a result the %age of iron become same in both the alloys. What is the weight of the each piece cut off..??
What is the minimum value of |x-2|+|x+3|+|x-5|
What is the minimum value of |x-1|+|x-2|+|x-3|+...+|x-9|+|x-10|? Can someone please help me here?
No. of natural solutions -
a+b+c+d = N
where a is less than equal to b , b is less than equal to c , c is less than equal to d
and N is between 5 and 500
( I was not able to type less than equal to symbol )
How many ratios of the form (p/q) do not form an integer, where p & q are distinct and belong to the set {1,2,3,4,5,6,7,8,9} ????
A positive whole number M less than 100 is represented in base 2 notation, base 3 notation, and base 5 notation. It is found that in all three cases the last digit is 1, while in exactly two out of the three cases the leading digit is 1. Then M equals? (CAT 2003)
The numbers of distinct quadratic equations of the type Px^2+ Qx+R=0 that can be formed when P,Q,R are selected from first 6 natural nos{1,2,3,4,5,6}??
I bought a book for 60. Then sold it for 70 but after a while bought it back from the same person i sold it to for 80..how much loss did i incur?
Pls explain
In norway when the price of eggs dropped by 20%..20 more Eggs cud be had for 20 kroner...wat was the price of an egg earlier?
Pls explain how to solve such ques!! Thanx!
TIME vs IMS Online Test Series..
Please Guide.. Any other sites apart from these two.
Thanks In Advance..