emelylug033
06.05.2020 •
Mathematics
We keep tossing a fair coin n = 106 million times, write down the outcomes: it gives a Heads-and-Tails-sequence of length n. We call an integer i special, if the i, i + 1, i + 2, i + 3, . . . , i + 18-th elements of the sequence are all Heads. That is, we have a block of 19 consecutive Heads starting with the i-th element of the sequence. Let X denote the number of special integers i. What is the expected value of X? I also want the numerical value. 5. We rand
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Ответ:
36
Step-by-step explanation:
do pemdas
inside parentheses first
2b-4
2 times 5 is 10
10 minus 4 is 6
6 times 6 is 36