Question

Three rock climbers started a climb with each person carrying 7.8 kilograms of climbing equipment.a fourth with no equipment joined the group.the group divided the total weight of climbing equipment equally among the four climbers.how much did each climber carry?

Answer 1

First we need to find out how much weight they were originally carrying. 

7.8 kg x 3 climbers
=23.4 kg

Now we can find out how much each person should carry after a fourth person joins the group. 

23.4 kg/4 climbers
=5.85 kg

Each climber carried 5.85 kg