The number of positive integer solutions for the equation x +y +z + t = 30 is  Choices:
A) 3854	B) 3654	C) 3764	D) 3960	E) 4964
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.   30-1 C 4-1 = 29C3 = 3654   Answer : 3654
<result>B</result>
The number of positive integer solutions for the equation x +y +z + t = 30 is