雞蛋1500隻,小販以900元購入,但破了100隻;若賺要220元,20隻雞蛋要賣幾元?

完整的蛋有=1500-100=1400
1400隻賣900+220=1120(原本買入用了900
要賺220)
平均一隻買:
1120÷1400
=0.8
20隻賣:
0.8×0
=16

雞蛋1500隻,小販以900元購入,但破了100隻;若賺要220元,20隻雞蛋要賣幾元?
. 歸一法:
平均一隻買:
1120÷1400
=0.8
20隻賣:
0.8×20
=16

答:所以20隻雞蛋要賣16元。

$16
if the hawker wants to make the profit of $220 which means he/she needs to sell all 1400 eggs at the price of $1120

$1120 / 1400 = $0.8 per egg
$0.8 x 20 = $16