document.write( "Question 1077356: please help me solve this question, on averages and range : \" a pupil has taken four exams and his mean score is 45%. In his next exam (his fifth exam) he only scores 20%. Find his mean mark for all five exams. \" thankyou.. \n" ); document.write( "

Algebra.Com's Answer #692838 by Fombitz(32388) $\"\"$ $\"About$

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$\"%28A%2BB%2BC%2BD%29%2F4=45\"$
\n" ); document.write( " $\"A%2BB%2BC%2BD=180\"$
\n" ); document.write( "So then,
\n" ); document.write( " $\"A%2BB%2BC%2BD%2BE=180%2B20\"$
\n" ); document.write( " $\"A%2BB%2BC%2BD%2BE=200\"$
\n" ); document.write( "and
\n" ); document.write( " $\"%28A%2BB%2BC%2BD%2BE%29%2F5=200%2F5\"$
\n" ); document.write( " $\"%28A%2BB%2BC%2BD%2BE%29%2F5=40\"$
\n" ); document.write( "Th new average is 40%.
\n" ); document.write( " \n" ); document.write( "

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