A woman has 10 keys, of which exactly one will open her car door. 1. If...

A woman has 10 keys, of which exactly one will open her car door.

1. If she tries the keys at random, discarding those that do not work, what is the probability that she will open the car door on her fourth try?

2. If she tries the keys at random and does not discard previously tried keys, what is the probability that she will open her car door on her fourth try?

Expert Solution

orchestra answered 1 year ago

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A woman has 10 keys, of which exactly one will open her car door. 1. If...

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