The probability of a shooter hitting a target with a single shot is 0.7. The random variable X is the number of misses in 10 shots?

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The probability of a shooter hitting a target with a single shot is 0.7. The random variable X is the number of misses in 10 shots? and got a better answer

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this is a binomial distribution: M X=np=10*0.7=7 D X=npq=10*0.7*0.3=2.1

 

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