Laura is the fundraising manager for a local charity. She is ordering caps for a upcoming charity walk. The company that makes t
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Answer:
Step-by-step explanation:
Given
Required
Probability that s/he gets at least one correctly
First, we calculate the probability of answering a question correctly
Since, there are just 2 choices (true or false), the probability is:
Similarly, the probability of answering a question, wrongly is:
The following relationship exists, in probability:
So, to calculate the required probability.
First, we calculate the probability that he answers none of the 8 questions correctly.
Substitute in
Take LCM
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<em>Hence, the probability that s/he gets at least one correctly is 0.9961</em>