Dice

How many times must you roll a die so that the probability of rolling at least one pětky exceeds 70%?

Final Answer:

N =  2

Step-by-step explanation:

r=70%=10070=107=0.7 p0=610.1667 p1=1p0=10.1667=650.8333  p1N r  N   ln p1  ln r  N0=ln(p1)lnr=ln0.8333ln0.71.9563  N=N0=1.9563=2



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You need to know the following knowledge to solve this word math problem:

combinatoricsarithmeticbasic operations and conceptsnumbersGrade of the word problem

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