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Class 10 Science| Chapter 6 Life Processes | Important Questions | Revision | Part-1

Class 10 Science| Chapter 6 Life Processes | Important Questions | Revision | Part-2

Out of 100 students who appeared for the SSC examination from a school 15 students in English ; 12 students in Mathematics; 8 students in Sience 7 studens in Mathematics and Science; 4 students in English and Science 6 students in English and Mathematics; 4 students in all the three subjects could get First calss marks. How many of them have got First class marks.(ii) only in Science (i) only in Mathmatics

Question Stimulus :- DIRECTIONS : Read the following passage carefully and answer the following questions The history of literature really began long before man learnt to write. Dancing was the earliest of the arts. Man danced for joy round his primitive camp fire after the defeat and slaughter of his enemy. He yelled and shouted as he danced and gradually the yells and shout became coherent and caught the measure of the dance and thus the first war song was sung. As the idea of God developed prayers were framed on generation to another, each generation adding something of its own As man slowly grew more civilized hee was compelled to invent some method of writing by three urgent necessities. Then were certain things that it was dangerous to forget and which, therefore, had to be recorded. It was often necessary to communicate with person who were some distance away and it was necessary to protect one's property by making tools cattle and so on, in some distinctive manner. So man taught himself to write and having learned to write purely for utilitarian reasons he used this new method for preserving his war songs and his prayers Of course, among these ancient people, there were only a very few individual who learned to write, and only a few could read what was written. What would be the most appropriate title of the passage ?

Question Stimulus :- DIRECTIONS : Read the following passage carefully and answer the following questions The history of literature really began long before man learnt to write. Dancing was the earliest of the arts. Man danced for joy round his primitive campfire after the defeat and slaughter of his enemy. He yelled and shouted as he danced and gradually th ylls and shout bcam coherent and caught the measure of the dance and thus the first war song was sung. As the idea of God developed prayers were framed on generation to another, each generation adding something of its own As man slowly grew more civilized hee was compelled to invent some method of writing by three urgent necessities. Then were certain things that it was dangerous to forget and which, therefore, had to be recorded. It was often necessary to communicate with person who were some distance away and it was necessary to protect one's property by making tools cattle and so on, in some distinctive manner. So man taught himself to write and having learned to write purely for utilitarian reasons he used this new method for preserving his war songs and his prayers Of course, among these ancient people, there were only a very few individual who learned to write, and only a few could read what was written. What will be the synonym of the word 'utilitarian' ?

The measurments ( in mm) of the diameters of the head of the screws are given below : Calculate the mean diameter of the screw by ' Assumed Mean Method' . Steps to calculate mean by this method : (1) Assume mean A. In this example , A = 40. (Generally, the class mark of the class having the maximum frequency or the class mark of the middle class is chosen as the assumed mean.) (2) In column 1, write the class intervals,(Here, diameter). (3) In column 2, write the corresponding class marks. (4) In column 3, write the value of d_(i), " where " d_(i) = x_(i) - A . A is the assumed mean. (5) In column 4, write the frequencies (f_(i)) . Write Sigma f_(i) at the bottom of this column. (6) In column 5, write the product (f_(i) xx d_(i)) and their sum Sigma f_(i) d_(i) . Calculate bar d " and " bar X using the following formulae : bard = (Sigma f_(i)d_(i))/(Sigma f_(i))." Mean" barX = A + bar d . [d : mean of deviations.]