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Answer :
Number of students who like football = 6
Number of students who like cricket = 12
Number of students who like tennis
= 30 – 6 – 12 = 12
(a) Ratio of number of students liking football to the number of students liking tennis
= 6 / 12 = 1 : 2
(b) Ratio of number of students liking cricket to total number of
= 12 / 30 = 2 : 5