ravi obtained 70 and 75 marks i. first two unit test . find the minimum marks he sould get in the third test to have an average of at least 60 marks.
rakeshmohata:
average score required = 60
so, total score required = 3×60 =180
ok
now let the score required in 3rd test be x.
so by problem,
=> 75 + 70 + x = 180
or, x = 180 - 70 - 75 = 35
so required marks in 3rd unit test = 35
hope this is ur required answer
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He will have to get 35 marks in the third test.
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Answered by
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(70+75+x)/3=60
(145+x)/3=60
ie 145+x=180(60*3)
x=180-145=35
That is Ravi should obtain 35 marks to get an average of 60 marks
(145+x)/3=60
ie 145+x=180(60*3)
x=180-145=35
That is Ravi should obtain 35 marks to get an average of 60 marks
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