The number of positive integer solutions for the equation x +y +z + t = 15 is Select:
A) 654 B) 584 C) 384 D) 364 E) 394
The number of positive integer solutions for the equatio fx1+x2+⋯+xn=k   (k-1)C(n-1)- where k is the number and n is number of variable in the equation.   15-1 C 4-1 = 14C3 = 364   Answer : 364
<result>D</result>
The number of positive integer solutions for the equation x +y +z + t = 15 is