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nivi

· started a discussion

· 1 Months ago

chptr (Question: 99472.0 )

how we know from starting itself that 10 chptr start from even number page?
i could nt get this solution please explain

Question:
A book contains 20 chapters. Each chapter has a different number of pages (each under 21). The first chapter starts on page 1 and each chapter starts on a new page. What is the maximum possible number of chapters that can begin on odd page numbers?
Options:
A) 19
B) 15
C) 10
D) 11
E) Can’t be determine
Solution:
There would be 10 chapters with even number of pages. Place them to start with each of them would start on an odd numbered page. After that start to place the chapters with an odd number of pages the first one would start on an odd numbered page, the second on an even numbered page, the third on an odd numbered page and so on. Thus there would be 10 + 5 = 15 chapters out of 20 which can at the maximum start on an odd numbered page. Hence, option (b) is correct.

Knowledge Expert

· commented

· 1 Months ago

There would be 10 chapters with even number of pages. Place them to start with each of them would start on an odd numbered page. After that start to place the chapters with an odd number of pages the first one would start on an odd numbered page, the second on an even numbered page, the third on an odd numbered page and so on. Thus there would be 10 + 5 = 15 chapters out of 20 which can at the maximum start on an odd numbered page. Hence, option (b) is correct
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