Related Questions

City High School must put together a debating team consisting of four debaters.There are candidates of equal ability : X,Y and Z who are all seniors; and A,B,C and D who are all juniors..The school requires that there should be two seniors and two juniors in the team.It is also necessary that all of the debaters be able to work with one another. *Debaters Y and A cannot work together. *Debaters Z and C cannot work together. *Debaters A and B cannot work together. which of the following statements must be false? 1.Debaters Y and C are never selected together. 2.Debaters Z and D are never selected together. 3.Debaters Z and D are never selected together.
ক Only I
খ Only II
গ Only III
ঘ All of these
In a school, students may bring breakfast, buy it, or may not eat breakfast. If 1/4 of the students bring breakfast, 1/7 don't eat breakfast, and 187 buy it, how many students bring breakfast?
ক 49
খ 58
গ 68
ঘ 77
ঙ None
A man and a boy together can complete a job in 81 days. Two men and three boys together can complete the same job in 36 days. In how many days can four men together complete the same job?
ক 21
খ 27
গ 30
ঘ 36
A can complete a task alone in 8 days, while B takes 12 days to do it by herself. Together with C it takes them 4 days to complete the work. If C and D together can complete the task in 15 days, then how many days will D need to complete the task by herself?
ক 36
খ 32
গ 40
ঘ 30
There are blank spaces in the following passage which have been numbered . These numbers are printed below the passage and against each some words are suggested . Find out the word that best fit the blank spaces. Global Strategies to control infective disease have historically included the erection of barriers to international travel and ___ (24) _______. Keeping people with such deadly disease outside national borders has ___ (25) _______ as an important public health policy in the human immunodeficiency virus (HIV) epidemic . Betwwn 29 and 50 countries ___ (26) _____ to have introduced border restrictions on HIV _ positive foreigners ,usually those planning an ___ (27) ___ stay in the country , such as students , workers or seamen.
ক migration
খ immigrate
গ emigration
ঘ immigration
A group of populations of different species living in the same habitat and interacting with one another is called:
ক Ecological Community
খ Zoological Community
গ Biological Community
ঘ None of Above.
Tow workers A and B are engaged to do a work . A working alone takes 8 hours more to complete the job than if both worked together . If B worked along, he would need 4.5 hours more to complete the job than they both working together . What time would they take to do the work together ?
ক 4 hours
খ 5 hours
গ 6 hours
ঘ 7 hours
For better strength and stability, the fine grained soils and coarse grained soils are compacted respectively as
ক dry of OMC and wet of OMC
খ wet of OMC and dry of OMC
গ wet of OMC and wet of OMC
ঘ dry of OMC and dry of OMC where OMC is optimum moisture content
In case of foundations on black cotton soils, the most suitable method to increase the bearing capacity of soils is to
ক Increase the depth of foundation
খ Drain the soil
গ Compact the soil
ঘ Replace the poor soil
If different processes are used to bring about the same chemical reaction, the enthalpy change is same for all of them. This is __________ law.
ক Hess's
খ Kirchoff's
গ Lavoisier and Laplace
ঘ None of these

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