A school librarian is purchasing books for the next school year. She surveyed 25 students and 6 said that they prefer science fi
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Answer:
0.03125
Step-by-step explanation:
If we have a fair coin the probability of landing a head is 50%.
We can think the question as what is the probability of landing four tails and then a head. That is we needed at least 5 tries to get a head.
Since this events are independent we can write it as