I'm assuming that the complete question is: In view of the fact that only the Israelites lived in the region of Goshen,how was it posssible for them to live right next to the Egyptians so that there was a need to mark their houses for the Passover?
The answer is that in Goshen there were many Israelites, but there may also have been some Egyptians. And some of the Israelites lived outside of Goshen among the Egyptians, as is implicit in Exodus 1:7.
The Hebrew people sprayed blood on the door of their houses in Egypt, and the angel passed by these houses. and the first born escaped. But the egyptians did not have it on their doors so their first born was slain.
There are two reasons, one didactic and one a pun: First, on the first Passover, the book of Exodus says that God "passed over" the houses of the Israelites that were daubed with the blood of the first Passover sacrifice, entering all other houses and killing the firstborn -- this was the final of the ten plagues that God brought upon Pharoh and the Egyptians for not letting the Israelites go.The second reason, the pun, is that, entirely by coincidence, the name Passover is very similar to Pesach, the Hebrew name of the festival. In other European languages, this pun doesn't work, so Passover are known by names that are simply transliterations (sometimes ugly, sometimes accurate) of Pesach. To add to the confusion, in some languages, Passover and Easter are known by the same name.
They lived in houses.
They remember the time when the LORD killed the first born of Egypt but passed over the houses of the children of Israel. You can read about it in the Old Testament book of Exodus Exo 12:27 that you shall say, 'It is the Passover sacrifice of the LORD, who passed over the houses of the children of Israel in Egypt when He struck the Egyptians and delivered our households.' " So the people bowed their heads and worshiped.
Pyramids
Passover is meant to make us remember that we were spared from the tenth plague in Egypt, the death of the first-born sons. The angel of death "passed over" the houses that were marked with the blood of the lamb, and we use Pesach to remind us to thank God for his mercy.
a wealthy Egyptians home
When the Pharaoh refused to let the Lords people leave Egypt he placed upon the Egyptians ten plagues. The last being that all of their firstborn would die. The Israelite people were told to sprinkle the blood of a sacrificed animal on their door frames and lintel. When G-d would come to smite the Egyptian firstborns, he would see the blood on the doorpost and skip over that house. That's why it is called passover. That is the same idea of the Hebrew name, Pesach, which means door.
buckets
huts
what are the names of women houses in ancient egypt
Mud bricks