There is 80% chance that a problem will be solved by a statistics student and 60% chance that it will be solved independently by a mathematics student

find the probabolity that it will be solved.

the probability that the problem will be solved by a statistics student = 80/100 = 4/5

the probability that the problem will not be solved by a statistics student = 1- 4/5 = 1/5

the probability that the problem will be solved by a mathematics student = 60/100 = 3/5

the probability that the problem will not be solved by a statistics student = 1- 3/5 = 2/5

the probability that the problem will not be solved by any of them = (1/5)*(2/5) = 2/25

the probability that the problem will be solved = 1 - 2/25 = 23 / 25

hope this helps you.

cheers!!