Question

At a busy street corner, the probability is that one of every hundred jaywalkers will be hit. What is his probability of not being hit if he makes a round trip daily for thirty days?

Answer 1

The correct answer to this problem is (0.9801)^30. I had this problem also.

Answer 2

Answer: $(0.99)^{60}$

Step-by-step explanation:

Given: The probability of jaywalkers will be hit =$P(hit)=\dfrac{1}{100}$=0.01

Then, the probability of not getting hit will be

$\text{P(not hit)}=1-\text{P(hit)}\\\\=1-0.01=0.99$

For round trip, the the probability of not getting hit =$(0.99)^2$

Now, for thirty days, the probability of not being hit if he makes a round trip daily for thirty days =$(0.99^2)^{30}=(0.99)^{60}$

Hence, the probability of not being hit if he makes a round trip daily for thirty days =$(0.99)^{60}$