A student scores 75%marks in his sixth semester.The average percentage of student increases by 5%,then what is the average percentage after sixth semester?
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let the average percentage before sixth semester be x
then, the totale percentage before sixth semester is 5x
now,
a/q
(5x+75)/6= x+5
=> 5x+75=6x+30
=>6x-5x=75-30
=> x = 45(average percentage before sixth semester )
now ,
average percentage after sixth semester
=> 45+5=50(coz in sixth semester average percentage increased by 5%)
then, the totale percentage before sixth semester is 5x
now,
a/q
(5x+75)/6= x+5
=> 5x+75=6x+30
=>6x-5x=75-30
=> x = 45(average percentage before sixth semester )
now ,
average percentage after sixth semester
=> 45+5=50(coz in sixth semester average percentage increased by 5%)
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