N taps no.d 1 to N are fitted to a tank. Rate at which n th tap where n=1 to N fills tank,equals the sum of rates of all taps numbered below it. Sixth tap fills it in 80mins, in how many mins will 9th tap fill it(mins) . Approach plz.
DETAILED WAY TO APPROACH
The volumes of two vessels, which are filled up to the brim by milk of different prices, are 220 L and 180 L. An equal amount of milk is taken out from each of the two vessels, and the milk taken out from the first vessel is poured into the second vessel while the milk taken out from the second vessel is poured into the first vessel. If the price per liter of milk in both the vessels becomes the same eventually, find the volume of milk taken out from each of the two vessels.
Three players Lal, Krishna and Aswini are playing a game in which they toss a coin cyclically in the order - Lal, Krishna, Aswini, Lal, Krishna, Aswini, Lal. ...- till a head shows. The player who gets a head on the coin first wins the game. The coin is loaded with P(Heads) = 0.25 and P(Tails) = 0.75. What is the probability that Krishna wins the game?
Ans : 12/37
Solution Please ????
I am getting 16/37...
Please help me out...
There are two green and one blue balls n balls drawn from bag where n=1,2,3.what is the probability that a green ball is drawn if all new= 1,2,3 are equally likely to occur. Answer 8/9.
Hello fellow Pagalguy friends! I have given a few Free mocks and some AIMCATs where my score in QA has been too less. Should I already refer to NCERT books for concept building?
find the unit digit: 37^123 * 43^144 * 57^226 * 32^127 * 52^5!
A watch which gains uniformly was observed to be 1 minute slow at 8 a.m on one day and at again on 6 p.m it became 1 minute fast.at what time did the watch show the correct time?
Explain your answer.
Whic institute section wise test is the best for QA prep ?? Also any institute having chapter wise qa test in order to strengthen basics ?? I can't afford CL test gym at 4000 bucks.any thing cheaper around 1-2k would be nice.do reply asap.the test should be having nice variety of all lod questions !!
In a big hostel, there are 1000 rooms. In that hostel only even members are used for room numbers, i.e. the room numbers are 2,4,6, ... ,1998, 2000. All the rooms have one resident each. One fine morning, the warden calls all the residents and tells them to go back to their rooms as well as multiples of their room numbers. When a guy visits a room and finds the door open, he closes it, and if the door is closed, he opens it. all 1000 guys do this operation. All the doors were open initially.
1. The last room that is closed is room number
a: 1936 b: 2000 c: 1922 d: none of these
2. The 38th room that is open is room number
a: 80 b: 88 c: 76 d: none of these
3. If only 500 guys, i.e. residents of room number 2 to 1000 do the task, then the last room that is closed is
room number :
a: 2000 b:1936 c: 1849 d: none of these
4. In the case of question 3, how many rooms will be closed in all?
a: 513 b:31 c:13 d: none of these
A bag consists of a total of 120 coins in denominations of Rs.1, Rs.2 and Rs.5. The value of Rs.2 coins is at most 40% of the total value of the coins. The value of Rs.5 coins in the bag is atmost 25% of the total value of the coins in the bag. If there are at most 70 Rs.1 coins in the bag, how many Rs.2 coins are there in the bag?
http://s10.postimg.org/tkczouss9/screenshoth_634.jpg
not able to solv this one. AM GM concepts involved kya ?
A container contains a mixture of wine and water in the ratio 1 : 3. What percentage of the mixture should a butler replace with another mixture that contains wine and water in the ratio 3 : 1 in order to make 100% profit by selling the resultant mixture at the price of the pure wine? (Assume the cost price of water is negligible)
Post the solution too..!
Julie typed a 6-digit number into a faulty computer in which the 1 (one) key was broken. The number appearing on the screen was 2003, possibly with some blank spaces. How many different 6-digit numbers could have Julie typed?
- 25
- 10
- 15
- 20
- None of these
0 voters
A six-digit natural number abcdef becomes defabc upon being multiplied by a natural number. Find the sum of its digits if they are distinct.
how many digits are there in 77!???
approach for such typ of quesns??
A train travels a distance of 192 km at an average speed of 80 km/h from station P to another station Q. It then travels back to P taking 5 hours 36 min. Find the average speed of the train on the return journey to P.
a) 72 km/h
b) 36 km/h
c)20 km/h
d)60km/h
find the range of th \e following
(x-2011)^2011 . (x-2014)^2014. (x-2020)^2020 (less than 0)