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i have completed understanding the concepts and practiced good amount of questions in verbal but i am not able to focus throughout the section so can anyone help me out regarding how to go about preparation in the verbal
Hi, a silly question may be but please answer, if I practice all the GMAT Prep(focus) questions from the question bank here, am I actually solving all the questions from the official mocks too?
Apologies, i think i posted in the wrong chat group
In a class of 40 students, the average score on a math test was 58. If 10 students scored above 70, and the remaining students scored below 50, what is the average score of the 10 students who scored above 70?
If you take avg score of 30 students is x and x<50 , Then total score of 10 top scorers=58*40-30x=2320-30x>2320-30*50=820 I.e average of top 10 students >82 Now taking x=49, Average of top 10 students=85
10 students scored above 70 And, 30 scored below 50
30 could have a max score of 49 Hence, the difference from avg score of 58 is 9 marks (i.e 58-49) The total shortfall of the score of 30 students to make an average of 58 marks will be 270 marks (9 marks each of 30 students)
This shortfall of 270 will be filled by 10 students who scored above 70 So, avg score of students above 70 will be = 58 + (270/10) = 58 + 27 = 85
10 students scored above 70 And, 30 scored below 50
30 could have a max score of 49 Hence, the difference from avg score of 58 is 9 marks (i.e 58-49) The total shortfall of the score of 30 students to make an average of 58 marks will be 270 marks (9 marks each of 30 students)
This shortfall of 270 will be filled by 10 students who scored above 70 So, avg score of students above 70 will be = 58 + (270/10) = 58 + 27 = 85
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This seems okayish but I am just thinking why should we try maximising the average of 30 people and then minimising for 10 people and get the answer? Any strong intuition behind doing that?
In a class of 40 students, the average score on a math test was 58. If 10 students scored above 70, and the remaining students scored below 50, what is the average score of the 10 students who scored above 70?
A) 82 B) 85 C) 88 D) 90 E) 92
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More importantly the average can be 46 or 48 also.. then what?