Two Interesting Probability Questions

*p* is probability that a man will success in a single shot

*n *is number of shots man is going to make

1) what is probability that a man will score __at least __one series of __at least__* k *__successive __successful shots (in the interval of n)?

2) what is probability that a difference between his unsuccessful shots __at any time__ (for the n={1,..,n}) and his successful shots (also score in that same time/for that same value of n) will __never be__ grater that *d *?

Hope you understand (Hi)