Hi...☺Here is your answer...✌Two digit multiples of 10 are10 , 20 , 30 , 40 , 50 ,60 , 70 , 80 and 90Sum of these multiples= 10+20+30+40+50+60+70+80+90= 450Now,HENCE,The average of two digit multiples of 10 is 50
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