Assertion :Mathematics textbook 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 : 80 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 $40 %$

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
Statement 1: Total number of pages = 320
Number of pages in chapter 'Symmetry' =272=261+1=12
So, required ratio = 12 : 320= 3 : 80
Statement 2: Ratio of students participate in the quiz = 2 : 5
So, number of students participate in the quiz $= \frac{2}{5} \times 100 = 40$
$∴$ Percentage of students that participate in the quiz $= \frac{40}{100} \times 100 = 40 %$

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Question 5

Only one of the four options is correct. Write the correct one.

Mathematics textbook for class VI 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

a) 11 : 320

b) 3 : 40

c) 3 : 80

d) 272 : 320

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Reason: A shell can have maximum

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