#Mathematics; 8+0=8,2+2=6 Puzzle;Reasoning problems with solution;Can you solve this?

Can You Solve This? 6div2(1+2)=

Problem Solving Based on Lecture 6 to 8

A problem in mathematics is given to three students and their respective probabilities of solving the problem are (1)/(2) , (1)/(3) and (1)/(4) . The probability that the problem is solved, is

Given the probability that A can solve a problem is 2/3, and the probability that B can solve the same problem is 3/5, find the probability that (i) at least one of A and B will solve the problem (ii) None of the two will solve the problem.