Without knowing the percentage of students who like football we can not tell you? <br />
Or is this some kind of trick: Football/football, football/soccer? Everyone loves soccer, so 100%, so 30 students?
Just how many questions are there on this math test or YOURS?
40 liked baseball and 10 liked hockey.
The baseball group has 1/2, or 4/8 in simpler terms. The hockey group has 1/8. Add the 4/8 and 1/8 together and you have 5/8. The rest of the group has to be the missing 3/8, or 30 units. Add them all together and you have 8/8, or 80 total.
30 students equals 5/8 of the students so there were 48 students asked about their favourite sport.