Zane's favorite rock group is in town this coming weekend, and his parents

have offered to take him and a friend to the concert. Zane knows that six

of his friends would like to go. However, at this late date, he figures that

the chance of anyone he invites being free to go is slim. What is the

probability that one of Zane's friends will be able to accept his invitation?

Can u help me

I really appreciate it