Question

7 To receive grade 'A' in a
receive grade 'A' in a cource, one must obtain an average of 90 marks or more in
epapers each of 100 marks. If Shikha scored 87,95,92 and 94 marks in first four
five pape
pers, find the minimum marks that she must score in the last paper to get grade
A' in the course.
paper​

Answer 1

Answer:

Let marks of third test be x

Total Subjects (combined) = 5

Total Marks obtained = 87+95+92+94+x

= 368+x

Mean = 90

Mean = Total Marks obtained/Total Subjects

$90 = \frac{368 + x}{5}$

$450 = 368 + x$

x = 82

She needs atleast 82 marks to get "A" grade.

If you find my answer good enough kindly mark it as Brainliest.