46. ASSERTION: Mathematics textboook for Class VII has 320 pages. The chapter 'Symmetry' runs from page 261 to page 272. The ratio of the number of pages of this chapter to the total number of pages of the book is 3: 81 160
REASON: In a school of 100 students, only 2 out of 5 students can participate in a quiz. The percentage of students that participate in the quiz is 40 %
47. ASSERTION: If x is 10% increased and then 30 10% decreased the resultant value is also x.
REASON: If x * 0/0 of y = y% of x. 999olgode,
48. ASSERTION: A dealer buys 200 quintals of wheat at Rs. 1200 a quintal. He spends Rs. 10,000 on transportation and storage. Then he sells the wheat at Rs. 13 per kg then the profit percentage of dealer is 8%.
REASON: Profit percentage=(Profit/ C .P.)100
46. The assertion is false because the ratio of the number of pages of the chapter 'Symmetry' to the total number of pages of the book is 12: 320, not 3: 81 or 160. The reason is false as well because the percentage of students participating in the quiz will actually be 40%, not 2 out of 5.
47. The assertion is true. If x is 10% increased, it becomes 1.1x. If this is then decreased by 10%, it becomes 0.9 * 1.1x = x.
48. The assertion is false. The profit percentage of the dealer is not 8%. The reason is not directly related to the assertion and does not provide a correct explanation.