Answer:
1. 34 students.
2. 6 is the median height.
3. 10 have 171cm 4 have 190cm.
4. 2 students have no taller than 171cm.
Step-by-step explanation:
I really can't explain it because it hard to explain how i answered your question.
Sum of n terms = a1 (r^n-1/ (r-1)
Sum of first one = 3 * (4^5 - 1) / 3 = 1023
.. 2nd = 5 * (6^2 - 1) / 5 = 35
.. 3rd = 5 ^4 - 1 / 4 = 156
.. 4th = 4 * (5^4 - 1) / 4 = 624
So in increasing order its 2nd, 3rd, 4th and first.