Answer with explanation:
![Q={\text{Median}}=90\\\\Q_{1}=78\\\\Q_{3}=102](https://tex.z-dn.net/?f=Q%3D%7B%5Ctext%7BMedian%7D%7D%3D90%5C%5C%5C%5CQ_%7B1%7D%3D78%5C%5C%5C%5CQ_%7B3%7D%3D102)
There are 100 students in the group.
If we divide 100 students into groups
→First quartile =25.5
means, first quartile of students has median value ≤ 78.
→Median =50.5
Most of the students sends ,90 messages a day.
→Third Quartile=75.5
Students lying above the third Quartile ,sends ≥102 messages per day.
First Quartile means, approximately 0- 25 students in the group , sends 78 messages.
![Q_{1}\leq 78](https://tex.z-dn.net/?f=Q_%7B1%7D%5Cleq%2078)
Third Quartile means, 75-100 , students in the group, sends 102 messages .
![Q_{3}\geq 102](https://tex.z-dn.net/?f=Q_%7B3%7D%5Cgeq%20102)
Approximately 25 students in the sample send
1. more than 102 text messages.
2.less than 78 text messages.