Two students (A and B) are challenged to solve a problem in statistics. Assume that the probability that A will solve the problem is 40%, the probability that B will solve problem is 55%, and probability that A or B will solve the problem is 25%. The probability that problem will be solved (both A and B will solve the problem) is:
A: 70%
B: 95%
C: 30%
D: 75%