Related Questions

In a certain class 40% of the students are girls, and 20% of the girls wear glasses. What percent of students in the class are girls who wear glasses.
A 6%
B 8%
C 20%
At a symposium, 20% of the professors are psychologists , 60% are biologists and the remaining 12 professors are economist. If 20 of the professors wear glasses, what percent of the professors do not wear glasses?
A 20%
B 331/3%
C 50%
D 66.2/3%
Opponents of laws that require automobile drivers and passengers to wear seat belts argue that in a free society people have the right to take risks as long as the people do not harm the others as a result of taking risks.As a result,they conclude that it should be each person's decision whether or not to wear a seat belt. Which of the following, if true,most seriously weakens the conclusion drawn above ?
A Many new cars are built with seat belts that automatically fasten when someone sits in the font seat.
B Automobile insurance rates for all automobile owners are higher because of the need to pay for the increased injuries or deaths of people not wearing seat belts.
C Passengers in airplanes are required to wear seat belts during takeoffs and landings.
D The rate of automobile fatalities in districts that do not have mandatory seat-belt laws is greater than the rate of fatalities in districts that do have such laws.
The students wear blue uniform. Here the word 'wear" can be replaced by.
A bear with
B put on
C put up
D put off
নিম্নের কোন oxide টিকে উভধর্মী oxide বলে?
A CaO
B MgO
C ZnO
D CuO
Which metal oxide is an amphoteric oxide?
A iron
B aluminium
C sodium
D potassium
__________ is the hardest material out of the following.
A Boron carbide
B Tungsten carbide
C Hardened steel
D Silicon carbide
which of the following is the hardest element?
A Iron
B Diamond
C Copper
D Silicon
Which of the following is the hardest rock?
A Granite
B Coal
C Chalk
D Diamond
Which of the following is the hardest?
A Austenite
B Pearlite
C Bainite
D Martensite

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