I already Answer two of the questions I just need to answer The last two could you mind help Me :<

Answer:
3) C. 8
4) D. 2
Step-by-step explanation:
40 pupils
avilon zoo 20%
science centrum 30%
oceanarium 25%
3) C. 8
solution
40 x 20% or .20 = 8
4) D. 2
sol
40 x 30% or .30 = 12
40 x 25% or .25 = 10
12 - 10 = 2