A survey among 40 students of a class was conducted where students were asked their favourite sport. 15 students voted for baseball, 12 for soccer, 8 for badminton, 3 for tennis and the rest voted for other games.

Which of the following represents, in decimal form, the fraction of students who voted for either soccer or badminton?

Answer: C. 0.5

First, determine the number of students who chose the specific sports mentioned. Based on the survey of total students: Soccer = 12 students, Badminton= 8 students
To find the number of students who voted for either soccer or badminton, add these two values together: 12+8=20 students
Next, express this group as a fraction of the total class size(40)
Fraction=20/40 =1/2=0.5

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