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A report consisting of 2,600 words is divided into 23 paragraphs. A 2-paragraph preface is then added to the report. Is the average (arithmetic mean) number of words per paragraphs less than 120?
(1) Each paragraph of the preface has more than 100 words.
(2) Each paragraph of the preface has fewer than 150 words.
The OA is B.
If the average is 120 words per paragraph, then for 25 paragraphs, there will be a total of 25*120 = 3000 words. So any total less than 3000 words will give an average less than 120.
(1) Each paragraph of the preface has more than 100 words.
The total number of words may or may not exceed 3000. Insufficient
(2) Each paragraph of the preface has fewer than 150 words.
The total number of words cannot exceed 2750 so the average is less than 120. SUFFICIENT
Hence, the correct answer is B.
Has anyone another approach to solving this DS question? Regards!
(1) Each paragraph of the preface has more than 100 words.
(2) Each paragraph of the preface has fewer than 150 words.
The OA is B.
If the average is 120 words per paragraph, then for 25 paragraphs, there will be a total of 25*120 = 3000 words. So any total less than 3000 words will give an average less than 120.
(1) Each paragraph of the preface has more than 100 words.
The total number of words may or may not exceed 3000. Insufficient
(2) Each paragraph of the preface has fewer than 150 words.
The total number of words cannot exceed 2750 so the average is less than 120. SUFFICIENT
Hence, the correct answer is B.
Has anyone another approach to solving this DS question? Regards!
