Question

Assume that 17% of people are left handed. if we select 6 people at random, find the probability of

a) If we keep picking people until we find a lefty,
long do you expect it will take?

Answer 1

If 17% of people are left-handed, then the probability of selecting a lefty in one random pick is 0.17. To find the expected number of people we need to pick until we find a lefty, we can use the concept of expected value.

The expected value is calculated by taking the reciprocal of the probability of an event occurring. In this case, the probability of finding a lefty is 0.17. So, the expected number of people we need to pick until we find a lefty is approximately 1 / 0.17 = 5.88.

Therefore, on average, we would expect to pick around 6 people until we find a lefty.