learning language skills

A chemical equation is a "balanced account of a chemical transaction." In any chemical transaction or reaction, the number of atoms of all the participating elements will remain proportionately constant before and after the reaction (The Law of Conservation of Mass..

Summary - The symbol of an element is a short way of representing an element . Some symbols are named after the first capital letter of the English name of the element. When there is more than one element starting with the same English capital alphabet, the second letter is also used in its lower c..

55% of the students took Spanish as second language in a school of 600 students. Find the number of students who took Spanish as second language. => 350 or 330 or 55 or 380..

A teacher wants 5 of her 15 students to write a skill test. In how many ways can she select 5 students? => 3008 or 2998 or 3013 or 3003..

A random sample of 81 students was tested for the problem solving approach skills. The variance of the scores obtained from the sample was found to be 144. Find the 80% confidence interval for the variance and standard deviation. Assume that the variable is normally distributed. => 122 &l..

At a fair, a boy tries his skill in shooting. He was to receive $2 for hitting the bull's eye and had to pay $0.50 for missing the bull's eye. He tried 30 shots, but received only $32.50. How many times did he hit the bull's eye? => 21 or 19 or 62.50 or 15..

The idea of writing a notice is to draw attention to something or some event that would take place. All the required information must be given in a simple, concise, attractive manner so that people notice it. A notice conveys information in a comprehensive manner. It is usually an advance informat..

. He had a curved, cosy, and rounded body, dark liquid eyes. He had bushy little hands, complete with thumbs that cutie pie used with astonishing speed and skill. Cutie Pie became an instant celebrity - he was a commercial success sold as Cutie Pie dolls, colouring books, tee-shirts, fan ..

A school enrolls students based on their performance in the written test and communication skill test. Each test has a maximum score of 75. The graph shows the inequalities that tells the status of a candidate: For admission x + y ≥ 50 For scholarship 4 x + 5 y ≥ 300 For accommodati..

An instructor randomly divides the classes such that half the class writes the final with a blue-book and half with a computer. In addition the students are partitioned into three groups, no typing ability, some typing ability, and highly skilled at typing. The students are given an essay..