45% of 1500 + 35% of 1700 = ?% of 3175
Let `x` % of 3175 = 45% of 1500 + 35% of 1700
Then , `x/100 xx 3175 = (45/100 xx 1500 + 35/100 xx 1700)` = 675 + 595 = 1270
`hArr x = ((1270 xx 100)/(3175))` = 40
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