This is in Statistics and Probability. Answer the problems below. This is only multiple choice. Provide necessary solution for each items. Thank you and Godbless. Follow the numbering.

25. In a group of 50 students, 40 study Statistics, 32 study Chemistry and each student studies at least one of these subjects. If a student from this group is selected at random, find the probability that she/he studies Statistics but not Chemistry. A) 9/25 C) 11/25 B) 10/25 D) 12/25 26. In a group of 50 students, 40 study Statistics, 32 study Chemistry and each student studies at least one of these subjects. If a student from this group is selected at random, find the probability that she/he studies Chemistry given that she/he studies Statistics. A) 11/20 C) 3/20 B) 9/20 D) 7/20