a) In a field
number of cows : number of sheep = 12: 5
Which two of the following statements must be correct about the sheep and cows in the field?
A there are exactly 5 sheep
B there are more than twice as many cows as there are sheep
C the number of cows is a multiple of 12
D there are 7 more cows than sheep
b) In a different field
the number of pigs: the number of goats = 11: 3
If there are 12 goats in the field, how many pigs are there?