Please Help Asap

#1
9 out of every 100 snarks is a boojum.

A)-find the prob. that none are boojum if encountered 2 snarks.
B) -Not all the snarks are boojums, if encounter 2 snarks.
C)- None are boojum, if encounter 5 snarks
D)- 1 of the snarks is boojum, if encounter 5 snarks
E)- At most 1 of the snarks is boojum, if encounter 7 snarks
F)- at most 3 of the snarks are boojums, if encounter 7 snarks
G)- At most 3 of the snarks are boojums, if encounter 11 snarks
H)- at least 4 of the snarks are boojums, if the group encounters 11 snarks



i can only figure out the first one...someone please help me asap!!!!