4 There are 270 students in Year 7
Each student studies one of French or German or Spanish.
Of these 270 students
2
study French
9
the number who study French : the number who study Spanish = 3:7
42 boys study German
Of the students who study German, what percentage are boys?
You must show your working.​

1. there are 25 students who started computer programming in elementary school and 25 students who started computer programming in middle school. the first group had a mean final project grade of 95% and the second group had a mean final project grade of 92%. the line plot shows the differences after 10 rerandomizations. determine whether the difference in the means of the two groups is significant based on the line plot. explain your answer.

Could someone with number 1 and 2

Tell whether the two rates form a proportion