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3 years ago

Any other thoughts i dont know which to choose

Mathematics

1 answer:

musickatia [10]3 years ago

3 0

He made his error in step 2 he already flipped 5/8 in step one then he flipped it again in step 2

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25% of all who enters a race do not complete. 30 haveentered.

nikklg [1K]

Answer:

The probability that exactly 5 are unable to complete the race is 0.1047

Step-by-step explanation:

We are given that 25% of all who enters a race do not complete.

30 have entered.

what is the probability that exactly 5 are unable to complete the race?

So, We will use binomial

Formula : $P(X=r) =^nC_r p^r q^{n-r}$

p is the probability of success i.e. 25% = 0.25

q is the probability of failure = 1- p = 1-0.25 = 0.75

We are supposed to find the probability that exactly 5 are unable to complete the race

n = 30

r = 5

$P(X=5) =^{30}C_5 (0.25)^5 (0.75)^{30-5}$

$P(X=5) =\frac{30!}{5!(30-5)!} \times(0.25)^5 (0.75)^{30-5}$

$P(X=5) =0.1047$

Hence the probability that exactly 5 are unable to complete the race is 0.1047

6 0

4 years ago

1. Why are students missing so much school in the district? A district administrator selects 300

Goryan [66]

Answer:

Shut up

Step-by-step explanation:

8 0

3 years ago

The outside temperature was 8 degrees. A cold front dropped the temperature 11 degrees. What is the new temperature?

const2013 [10]

One the temp is going dropping which sets up for a negative number resulting in -3 degrees

8 0

3 years ago

If 5(x+8)=2, then _+ _ =2.

kozerog [31]

Answer:

5x + 40 = 2

Step-by-step explanation:

Distribute within the ()s. 5 * x = 5x and 5 * 8 = 40.

4 0

4 years ago

Law of Sines or Law of Cosines....Help!!

iren2701 [21]

Answer:

Law of cosines to find missing measures

c^2= a^2+ b^2 - 2ab*cos(C)

Used because it is a SAS triangle

Step-by-step explanation:

This is known as a side, angle, side, or SAS triangle. We can find the missing measures by using the Law of cosines

c^2= a^2+b^2-2ab*cos(C)

7 0

3 years ago