Shamali secured 75,90 and 82 marks in three mathematics tests respectively. How many marks must she secure in the the next test to have an average of exactly 85 for the four mathematics tests ?
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Answers
Answered by
1
Answer:
93
Step-by-step explanation:
Total marks-85×4=340
Marks for fourth test=340-(75+90+82)
=340-247
=93
Answered by
2
Answer:
93 marks are needed
Step-by-step explanation:
to get the average
avg marks = total marks / no. of tests
let the marks of 4th test be x
so
85 = (75+90+82+x)/4
85 = 247+x /4
on solving
x=93
if it helps...mark as brainliest....
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