Each student got 62 + 43 = <<62+43=105>>105 pens to start with.
They pooled them to get 105 * 3 = <<105*3=315>>315 pens in the pool.
They took 37 pens in the first month, leaving 315 - 37 = 278 pens in the pool.
They took 41 pens in the second month, leaving 278 - 41 = 237 pens in the pool.
237 pens were split into three equal parts to give 237/3 = <<237/3=79>>79 pens each.
#### 79