There are 3 drawers and 5 distinct books. In how many ways can you put the 5 books in 3 drawers so that there is atleast 1 book in each drawer? Can someone please give the approach. TIA
A B C Starr from the same place and travel in the same direction at speeds 30 40 60 km/hr. B starts 2 hours after A. If B and C overtake A at the same instant, how many hours after A did C start? Approach please!
A overtakes B and C at 8am and 9am respectively. A meets D coming from the opposite direction at 10am. B and C meet D at 12 noon and 2pm respectively. When did B overtake C.
pls help me with this
when finding annual installments using simple interest..for ex... p is the principal and 10 is the rate of interest... let there be 3 annual installments and value of each installment be x then.....
p = x/1.1 + x/1.2 + x/1.3 ?
1.3p = x*1.2 + x*1.1 + x ?
which one is true?
In a race of 1 km, Abdul beats Bilal by 25 seconds, who beats Faheed by 75 seconds. If Bilal and Faheed run an 800 m race, then Bilal would beat Faheed by 300 metres. Find the time taken by Abdul to run a 800 m race
Rohan has a certain number of sweets (less than 10k). He is left with one sweet if he divides them equally among 12 or 16 or 18 children. If her divides them equally among 17 children, he has no sweets left. Find the number of possibilities of the sweets
Soln
The equation boils down to
144x+1 must be divisible by 17.
I was able to find out the first number to be 288+1 = 289. How do I go about in finding the other possibilitie?
Let g(x) be a function such that g(x + 1) + g(x – 1) = g(x) for every real x. Then for what value of p is the relation g(x + p) = g(x) necessarily true for every real x?
I am trying to apply for FMS and MDI, but facing problems in both.
In FMS after clicking submit button after attaching all the images in .jpg format exception page is appearing. This has happened minimum 20 times. Please help.
While in MDI the page is taking too much time to load/open. Please advise
Four dice are thrown simultaneously, in how many different ways the sum of the outcomes is 14.
I got 138 by taking cases. I might be wrong. Is there an easy method to ensure that the different permutations are counted only once. Because depending on how many of the variables in a+b+c+d = 15 are equal the number of permutations keeps changing.
Sultan Singh marked up the price per kg of black gram by 20% . He then adulterated 40kg of black gram with black stones and then sold entire quantity at 11.11% discount. He eventually earned profit of 8%. what was quantity of black stones added?
A medical clinic tests blood for certain disease from which approximately one person in a hundred suffers. People come to the clinic in group of 50. The operator of the clinic wonders whether he can increase the efficiency of the testing procedure by conducting pooled tests. In the pooled test, the operator would pool the 50 blood samples and test them altogether. If the pooled test was negative, he could pronounce the whole group healthy. If not, he could then test each person’s blood individually. The expected number of tests the operator will have to perform if he pools the blood samples are: