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A freshman in high school randomly selects answers on a ten-question, five-choice (a,b,c,d,e) survey. Please show...

A freshman in high school randomly selects answers on a ten-question, five-choice (a,b,c,d,e) survey. Please show work!

1. What is the probability of guessing at least one correct question correct?

2. What is the probability of passing with a (70% or higher)?

3.What is the probability of getting fewer than 3 questions correct?

Math   Statistics-And-Probability   
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