20 important questions

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A seminar is given to the students of five classes of a school on the importance of communication skills. The number of students of each class who attended the communication skills development classes before and after attending the seminar are listed in the table. At 95% confidence, find ..

Introduction - Sodium belongs to Group I in the periodic table. This group is otherwise known as the alkali metals group. Since the atomic number of sodium is 11, its electronic configuration is 2,8,1. Sodium easily loses the lone electron to attain the stable configuration of neon. Therefore alkal..

="center"> 19 2,8,8,1 Calcium Ca 20 2,8,8..

It is most commonly occurring intracellular(inside cytoplasm of cell)cation. It is involved in : 1.Many chemical activities inside cells 2.The contraction of muscles. 3.The transmission of nerve impluses. 4.The maintenance of the electrolyte bal..

Sugar imported from various countries to the United States is shown in the circle graph. What percent of total sugar is imported from India? => 45 or 30 or 60 or 50..

The line graph represents the number of cars(in millions) imported during the years 1996 to 2000. Find the ratio of the maximum imports of cars to the minimum imports of cars. => 5 : 1 or 2 : 5 or 5 : 2 or 1 : 5..

The U.S. imported oil at the rate of 6 million barrels per day in 1978. In 1990, the oil import rate rose up to 7 million barrels per day . Find the percent of increase in imports. => 16.6% or 17% or 16% or 17.6%..

The number that is 20 less than 30 is ______. => 50 or 30 or 10 or 20..

Which of the following is the same as 20 + 15? => 5 + 15 or 20 + 5 or 10 + 20 or 17 + 18..