document.write( "Question 998667: The average of some Natural number is 15 if 30 is added to first number and 5 is subtracted from the last number the average becomes 17.5 then the no. Of natural no. Is \n" ); document.write( "
Algebra.Com's Answer #616480 by ikleyn(52790)\"\" \"About 
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\n" ); document.write( "The average of some Natural number is 15 if 30 is added to first number and 5 is subtracted from the last number the average becomes 17.5 then the no. Of natural no. Is
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\n" ); document.write( "\n" ); document.write( "The average of how many \"Natural number\"?\r
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