Some Mathematics Books:-
Schaum Series DIFFERENTIAL EQUATIONS.
Schaum Series COMPLEX VARIABLES (2nd Ed.)
Advanced Engineering Mathematics -
Differential Equation (G.F. Simmons)
few more uploaded soon...
Some Probability & Statistics Books:-
Probability & Statistics for Engineers & Scientists - 9th Ed. (WALPOLE|MYERS|MYERS|YE).
An Introduction to Probability & Statistics - 2nd Ed. (ROHTAGI|SALEH)