http://i.imgur.com/uK99clw.png
Explain a bit please. The answer looks ambiguous.
Does anyone have any idea/remember LR sets from CAT 14, especially the one with some binary logic?
How many numbers below 99000 have sum of digits equals 13 is ?
pls post the approach too...
If a+b+c=20, and 1/a+1/b+1/c=30
then the value of a/b + b/c + a/c + c/a +b/c+c/b is ?
a 597
b 8
c 350
d 441
work experience in?
- Banking
- Others
- Marketing and Sales
- Core Engineering
- IT industry
0 voters
How can we use this thread to start learning Quant and practice math from easy to hard questions?
any thread for
the no of ways of selecting 8 books from a lib which has 9books each f Math,P,C n bio a. 165 b 27C8 c. 3^8 d.81
Asha and Vinay play a no. game where each is asked to select a no. from 1 to 5.If the two nos.match,both of them win a prize .The probab. that they will not win a prize in a single trial is?
sol:24/25
The no. of ways in which 6 British and 5 French can dine at a round table if no to French are to sit together is given by?
sol:5!X4!
Sunil and Kapil toss a coin alternatively till one of them gets a head and wins the game.If sunil starts the game ,the probab. that sunil will win?
sol:0.33
A student is to answer 10 out of 13 questions in a test such that he/she must choose atleast 4 from the first 5 questions.The no. of choices available to him are?
sol:140
The no. of 0s at the end of 60! is?
sol:14
10 diff letters of an alphabet are given.Words with 5 letters are formed from these given letters.Find the no. of words which have atleast 1 letter repeated.
sol:30240
There are 4 applicants for the post of the indian cricket captain and 1 of them is to be selected by the votes of the selectors .The no. of ways in which the votes can b given is?
A room has 3 lamps.From a collection of 10 light bulbs of which 6 are not good,a person selects 3 at random and puts them in a socket. The probab. that he will have light is?
A milk vendor sells 10L of milk from a can containing 40L of pure milk to the 1st customer. he then adds 10 L of water and sells 10L to the 2nd customer. he then again adds 10L water and then sells 10L to the 3rd customer and so on. what amount of pure milk will the 5th customer receive ?
i did this => 40(1 - 10/40)^5 = 1215/128
but the answer is = 405/128
can someone pls explain this ?