if p,q and r are three natural number such that p/q = 4/3 then which of the following can be the value of (p/q + q/r + r/p + r/q +p/r +q/p)
A train requires 7 seconds to pass a pole while it requires 25 seconds to cross a stationary train which is 378 m long. Find the speed of the train.
Two trains for patna leave delhi at 6 am and 6.45 am and travel 98 kmph and 136 kmph respectively. How many km from delhi will the two trains meet?
In a pack of 52 cards there are four suits (Club, Heart, Spade, Diamond), each having 13 cards of different denominations. Out of the 52 cards, there are 12 face-cards, 3 from each suit. From the pack, all face-cards are removed and four cards are drawn at random one by one without replacement. Find the probability that they are of the same suit.
I did 10C4 X 4/ 40C4
Is this wrong or right? if it is wrong then why?
Hursh Sarma has a salary of ` 10,800 per month. In
the first month of the year, he spends 40% of his
income on food, 50% on clothing and saves 11.11%
of what he has spent. In the next two months, he
saves 9.09% of what he has spent (spending 38.33%
of his income on food). In the fourth month, he gets
an increment of 11.11% on his salary and spends
every single paise on celebrating his raise. But from
the fifth month onwards good sense prevails on
him and he saves 12.5%, 15%, 20%, 10%, 8.33%,
12.5%, 15% and 20% on his new income per month.
The ratio between the sum of the savings for the two
months having the highest savings to the sum of
the savings for the two months having the lowest
guys my 10th percentage are not filling up....
i have 460/600 but it is not taking percentage ........pleaese help
A boat travels upstream, from point X to point Y, and then returns from point Y to point Z, mid-way between X and Y, and takes 14 hours for the entire trip. If the boat would take 6 hours to travel from X to Y in still water, find the time that the boat took to travel from Y to Z?
In mock, I took speed in still water as 20 and got right answer luckily. Can anyone suggest best method do it(no intricate equations please)