Value 10. 5 + 3 times 2 minus 6

Mathematics

1 answer:

krok68 [10]3 years ago

8 0

10.5 + 3 X 2 - 6 = 10.5

steps: 3X2 = 6

10.5 + 6 = 16.5

16.5- 6 = 10.5

let me know if i did something wrong

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a) The probability that at least 5 ties are too tight is P=0.0432.

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In this problem, we could represent the proabilities of this events with the Binomial distirbution, with parameter p=0.1 and sample size n=20.

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The probability that at least 5 ties are too tight is P=0.0432.

a) We can express the probability that at most 12 ties are too tight as:

$P(x\leq 12)=\sum\limits^{12}_{k=0} {\frac{n!}{k!(n-k)!} p^k(1-p)^{n-k}}\\\\P(x\leq 12)=0.1216+0.2702+0.2852+0.1901+0.0898+0.0319+0.0089+0.0020+0.0004+0.0001+0.0000+0.0000+0.0000\\\\P(x\leq 12)=1$