15. Ten students consist of 6 girls and 4 boys are standing in a line and one of the girls is monitress.
It is required that at least one girl has to stand in the last of the line and the first student cannot be monitress.
Find the number of ways that can be formed.​

Rick is driving to his uncles house in greenville,which is 120 miles from ricks town .after covering x miles rick she's a sign stating that greensville is 20 miles away. which equation when solved will give the value of x. a: x+120 = 20 b: x x120 =20 c: x +20 equals 120 d: x x20= 120