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Question 118
30% of the students in a class has mobile phones, 10% of the students who have mobile phones has a bluetooth facility. If the class has 200 students, how many have bluetooth facility ?
Solution
Total students = 200
Students who have mobile phones = $$\frac{30}{100}\times200=60$$
=> Students who have bluetooth facility = $$\frac{10}{100}\times60=6$$
=> Ans - (B)
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