40% of the students in a class have mobile phones, 15% of the students who have mobile phones have a Wi-Fi facility. If the class has 200 students, how many have Wi-Fi facility?
1
12
2
16
3
18
4
15
40% of the students in a class have mobile phones, 15% of the students who have mobile phones have a Wi-Fi facility. If the class has 200 students, how many have Wi-Fi facility?