In the first four papers each of 100 marks, Rishigot `95 ,72 ,73 ,83`marks. If he wants an average of greater than or equalto `75`marks and less than `80`marks, find the range of marks he should score in thefifth paper.

In the first four papers each of 100 marks, Rishigot `95 ,72 ,73 ,83`m

1.	In the first four papers each of 100 marks, Rishigot `95 ,72 ,73 ,83`marks. If he wants an average of greater than or equalto `75`marks and less than `80`marks, find the range of marks he should score in thefifth paper.
Answer» Let marks in `5^(th)` paper be x Average=`(95+72+73+53+x)/5` `=(323+x)/5` `75<=(323+x)/5<80` `375<=323+x<400` `52<=x<77` `[52,77)`.