Вопрос
1000 INDEPENDENT REPEATED TESTS ARE CONDUCTED . IN WHICH THE OCCURRENCE OF EVENT A(P(A)=0.006) IS RECORDED. RANDOM VARIABLE X - NUMBER OF APPEARANCE : S OF EVE NT A. THE SUM OF PROBABIL -ITIES OF VALUES OF RANDOM I VARIABLE X IS EQ UAL TO Select one: 0.994 0.006 6 D 1000 1
Решения
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Семён
мастер · Репетитор 5 летЭкспертная проверка
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The sum of probabilities of all possible values of a random variable is always equal to 1. In this case, the random variable X represents the number of occurrences of event A, and the probability of event A occurring is given as P(A) = 0.006. Since the tests are independent and repeated 1000 times, the sum of probabilities of values of random variable X is equal to 1.<br /><br />Therefore, the correct answer is 1.
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