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vivado [14]
2 years ago
11

HELP IF I DONT PASS THIS IS STAY IN THe GRADE I AM IN PLZZ​

Mathematics
2 answers:
kotegsom [21]2 years ago
8 0

Answer:

2 1/9

Step-by-step explanation:

decimal 2.111111111111111111111111111

just cut 2 in half then 2/9 in half

krok68 [10]2 years ago
5 0

Answer:

2 1/9

Step-by-step explanation:

turn the mixed number into an irregular fraction then divide.

38/9 ÷ 2

38/9 * 1/2 = 38/18 because you multiply by the reciprocal

2 1/9 is the answer

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In 2019, approximately 97.4% of all the runners who started the Boston Marathon (in Boston, Massachusetts, USA) were able to com
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Answer:

The probability that exactly 97 of them finished the marathon​ is 0.221.

Step-by-step explanation:

We are given that in 2019, approximately 97.4% of all the runners who started the Boston Marathon were able to complete the 42.2 km race.

100 runners are chosen at random.

The above situation can be represented through the binomial distribution;

P(X = x) = \binom{n}{r} \times p^{r} \times (1-p)^{n-r};x = 0,1,2,3,......

where, n = number of trials(or samples) taken = 100 runners

           r = number of success = exactly 97

           p = probability of success which in our question is the probability

                 that runners finished the marathon​, i.e; p = 0.974

So, X ~ Binom(n = 100, p = 0.974)

Now, the probability that exactly 97 of them finished the marathon​ is given by = P(X = 97)

         P(X = 97) = \binom{100}{97} \times 0.974^{97} \times (1-0.974)^{100-97}

                          = 161700 \times 0.974^{97} \times 0.026^{3}

                          = 0.221

Hence, the required probability is 0.221.

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3 years ago
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