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Class 10 exercise 3.2 |
| Answer» 1. Form the pair of linear equations in the following problems, and find their solutions graphically.(i) 10 students of Class X took part in a Mathematics quiz. If the number of girls is 4 more than the number of boys, find the number of boys and girls who took part in the quiz.(ii) 5 pencils and 7 pens together cost 50, whereas 7 pencils and 5 pens together cost 46. Find the cost of one pencil and that of one pen.Solution:(i)Let there are x number of girls and y number of boys. As per\xa0the given question,\xa0the algebraic expression can be represented as follows.x +y = 10x– y = 4Now, for x+y = 10 or x = 10−y, the solutions are;For x – y = 4 or x = 4 + y, the solutions are;The graphical representation is as follows;Click on the given link to continueNCERT Solutions for Class 10 Maths Exercise 3.2 | |