# How many have Bluetooth facility?

30% of the students in a class has mobile phones, 10% of the students who have mobiles phones has a Bluetooth facility. If the class has 200 students, how many have Bluetooth facility?

- 2
- 6
- 8
- 7

**Answer: (2) 6 **

**Explanation:-**

The total number of students in the class = 200

30% of the students in a class has mobile phones,

Then, the number of students who have mobile phone = 200 x 30/100

= 60

10% of the students who have mobiles phones have mobiles phones have a blue tooth facility.

Then, the number of students who have a blue tooth facility = 60 x 10/100

= 6

Hence, the correct answer is option (2) 6.