If you have a square of side , its diagonal would be , and its area
If the big square has a area of 900, this implies that its side is , so the two diagonal of squares 2 and 4 added together would be , therefore one diagonal wold be . and its side . The area (of one square) is
finally the two areas combined (squares 2 and 4) would be 225
When, correct is 0 then p is 0/20. correct is 1 p is 1/20 correct is 2 p is 2/20 that is 1/10 correct is 3 p is 3/20. correct is 4 p is 4/20 that is 1/5 correct is 5 p is 5/20 that is 1/4