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In an examination the average marks was found to be 60.The marks of 80 candidates had to be changed from 95 to 70 each and the ave

By Madelyn

In an examination the average marks was found to be 60.The marks of 80 candidates had to be changed from 95 to 70 each and the average came down to 55 marks.The total number of candidates attended the examination were ______?

a.800
b.300
c.400
d.650​

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Madelyn

find the value of k if x-3 is the factor of kx^²x^³-kx^²+3kx-k​

Find out about the National
calendar of India and make its comparison with Gregorian calendar on Any Three points
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1 thought on “In an examination the average marks was found to be 60.The marks of 80 candidates had to be changed from 95 to 70 each and the ave”

  1. Step-by-step explanation:

    80 student marks change 20 student mark remain same let 20* marks =Y

    80*95+20*marks=60*number of students

    80*95+Y=60n

    similarly

    80*70+Y=55n

    subtracting

    80*25=5n

    n=80*5=400

    option c

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