11. A company contracts to paint 3 houses. Mr.Brown can paint
a house in 6 days while Mr.Black would take 8 days and Mr.Blue 12 days. After 8
days Mr.Brown goes on vacation and Mr. Black begins to work for a period of 6
days. How many days will it take Mr.Blue to complete the contract?
12. 2 hours after a freight train leaves Delhi a passenger train leaves the same
station travelling in the same direction at an average speed of 16 km/hr. After
travelling 4 hrs the passenger train overtakes the freight train. The average
speed of the freight train was?
13. If 9x-3y=12 and 3x-5y=7 then 6x-2y = ?
1. The office staff of XYZ corporation presently consists of three bookeepers--A,
B, C and 5 secretaries D, E, F, G, H. The management is planning to open a new
office in another city using 2 bookeepers and 3 secretaries of the present staff
. To do so they plan to seperate certain individuals who don't function well
together. The following guidelines were established to set up the new office.
I. Bookeepers A and C are constantly finding fault with one another and should
not be sent together to the new office as a team
II. C and E function well alone but not as a team , they should be seperated
III. D and G have not been on speaking terms and shouldn't go together
IV Since D and F have been competing for promotion they shouldn't be a team.
1.If A is to be moved as one of the bookeepers,which of the following cannot be
a possible working unit.
2.If C and F are moved to the new office,how many combinations are possible
3.If C is sent to the new office,which member of the staff cannot go with C
4.Under the guidelines developed,which of the following must go to the new
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