Question

13. Imagine that you are taking a class and your chances of being asked a question in class are 1% during the first week of class and double each week thereafter (i.e., you would have a 2% chance in Week 2, a 4% chance in Week 3, an 8% chance in Week 4). What is the probability that you will be asked a question in class during Week 7?

Answer 1

Answer: There is probability that he will be asked a question in class during Week 7 is 64%.

Explanation:

Since we have given that

Probability that question in class being asked during Week 1 = 1%

Probability that question in class being asked during Week 2 = 2%

Probability that question in class being asked during Week 3 = 4%

and so on.

So, we need to find the probability that question being asked in class during week 7.

Since it forms geometric series:

1%, 2%, 4%, ........

So, we need to find the 7 th term:

`a_n=ar^(n-1)\\\\a_7=ar^(7-1)\\\\a_7=1(2)^6\\\\a_7=64\%`

Hence, there is probability that he will be asked a question in class during Week 7 is 64%.