Yes they are correct.
At least I'm pretty sure they are:)
The statement is contradictory, because it is said that every member of the family gives a gift to every other member of the family. And from 10 members, there are just 2 exchanging. Anyway, maybe they are only 2 members exchanging the gifts at that point in time.
So, each member will exchange 9 gifts (that is 10 members total minus herself), and 2 members are exchanging gifts at that point, so 18 gifts are being exchanged.
1 + 1 + 20 cents + 3 cents = $2.23
<span>For example
let there be 100 students
so the number of girls=40
20% of girls=20%of40=20*40/100=8 wear glasses
Which means 8 out of 100 students wear glasses
So 8%students wear glasses</span>
Answer:Natural numbers Whole numbers Integers Rational numbers Irrational numbers Real numbers.
