The friends Sandra, Steffi, Senna, Ozlem, Janina and Nina are 91 years old together. Sandra and Janina as well as Ozlem and Stef
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Each question has four choices, then the probability to guess a correct answer is 
and the probability to select incorrect choice is 
.
You have a 5-question multiple-choice test, then n=5. The <span>probability that you will guess exactly three out of five questions correctly is </span>
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.
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You have a 5-question multiple-choice test, then n=5. The <span>probability that you will guess exactly three out of five questions correctly is </span>
<span /><span>
</span><span>
<span />
Answer:
here it is
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