Q1 $\displaystyle \binom{6}{3}+\binom{5}{2}+\binom{8}{4}$
Q2 The need to make up a venn digram. Label each section then start with the inner union and work backwards to get the number of students that study 'only french and russian' and 'only french and german' this will give you how many students syudy 'only french'. My answer was 104 students all together.