Let, Harri has “x” no. of marbles
Therefore, salim has “3x” marbles
And, luke has “3x-4” marbles
Total marbles= 52
Therefore, x + (3x) + (3x-4) = 52
7x-4 =52
7x = 52+4
7x = 56
X= (56/7)
X = 8
Therefore, harri has 8 marbles
Salim has 8*3 = 24 marbles
Luke has 24-4 =20 marbles
Harri:luke = 8:20 = 1 : 2.5
If 1:p = 1:2.5
Hence, p= 2.5