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數學問題求幫忙plz
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問題內容： http://b54.in/98ay 請數學神解答 謝謝!!
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1)5 2) class interval......tally........frequency 86-90.................正................5 91-95.................正ll..............7 96-100...............正l.............. 6 101-105.............正ll..............7 106-110.............正l...............6 111-115.............l...................1 116-120.............l...................1 121-125.............ll...................2 126-130.............l....................1 131-135.............llll..................4 ............................total.............40 *tally 要用四豎一橫(唔識形容)嘅方式，但係電腦打唔到，正係5，一豎係1，恕我唔識到 3) IQ score less than..........cf 85.5.................................0 90.5.................................5 95.5.................................7 100.5...............................6 105.5...............................7 110.5...............................6 115.5...............................1 120.5...............................1 125.5...............................2 130.5...............................1 135.5...............................4 ..........................total.......40 因為佢話total 要40 所以係咁，而唔需要計埋上個colum (即95.5那個數，唔需要加埋90.5個數) 有咩唔明，可以補充
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