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In 5 of the 9 subjects, a student scored an average of 72 marks and an
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25 Jul 2023, 23:43
25 Jul 2023, 23:43
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In 5 of the 9 subjects, a student scored an average of 72 marks and an average of 81 marks in the remaining four subjects. What is the average marks scored by student in all the nine subjects?
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Re: In 5 of the 9 subjects, a student scored an average of 72 marks and an
[#permalink]
17 Sep 2023, 08:59
17 Sep 2023, 08:59
Expert Reply
OE
.It is given that in 5 of the 9 subjects, a student scored an average of 72 marks, and
an average of 81 marks in the remaining 4 subjects.
We need to find the average marks scored by student on all the nine subjects.
We know,
Average= 72= sum of all the marks in 5 subjects/5=72*5=360
For other four subjects, average is 81 marks. So
Sum of the marks in four subjects = 81 × 4 = 324
Total marks in all 9 subjects = Sum of the marks scored in 5 subjects + Sum of the
marks scored in remaining 4 subjects
= 360 + 324 = 684
Combine average=684/9=76
.It is given that in 5 of the 9 subjects, a student scored an average of 72 marks, and
an average of 81 marks in the remaining 4 subjects.
We need to find the average marks scored by student on all the nine subjects.
We know,
Average= 72= sum of all the marks in 5 subjects/5=72*5=360
For other four subjects, average is 81 marks. So
Sum of the marks in four subjects = 81 × 4 = 324
Total marks in all 9 subjects = Sum of the marks scored in 5 subjects + Sum of the
marks scored in remaining 4 subjects
= 360 + 324 = 684
Combine average=684/9=76
gmatclubot
Re: In 5 of the 9 subjects, a student scored an average of 72 marks and an [#permalink]
17 Sep 2023, 08:59
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