If two coins are tossed 100 times, what would the theoretical probability that the coins will land, one head, one tail?

Write the following as a base and exponent

The track team ran a mile and a quarter during their practice how many kilometers did her team runs?

1. if events a and b are non-overlapping events, how do you find the probability that one or the other occurs? 2. what does it mean if p(a or b) equals 1?