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VikaD [51]
3 years ago
11

Tamar ran 2/3 of a mile every day for 5 days. About how far did he run altogether what is the awnser plz help me

Mathematics
2 answers:
charle [14.2K]3 years ago
7 0

Answer:

Tamar would have ran \frac{10}{3} mile.

Step-by-step explanation:

Distance covered by Tamar everyday by running = \frac{2}{3} mile

Number of days he ran \frac{2}{3} mile = 5 days

Total distance covered by him if he had run altogether :

5\times \frac{2}{3} mile=\frac{10}{3} mile

He would have ran \frac{10}{3} mile.

iragen [17]3 years ago
4 0
Distance in one day = 2/3 mile
distance in 5 days = 2/3 miles * 5
= 10/3 miles
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5 0
3 years ago
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A certain insecticide kills 60% of all insects in laboratory experiments. A sample of 12 insects is exposed to the insecticide i
Vilka [71]

Answer:

The probability that exactly 10 insects will die

                     P( X = 10 ) = 0.06385        

Step-by-step explanation:

<u><em>Step(i):-</em></u>

Given a certain insecticide kills 60% of all insects in laboratory experiments

Given proportion  p = 0.60

                           q = 1 - 0.60 = 0.40

Given sample size 'n' = 12

<u><em>Step(ii):</em></u>-

Let "X' be the random variable of binomial distribution

                              P(X=r) = n_{C_{r} } p^{r} q^{n-r}

The probability that exactly 10 insects will die

                              P(X=10) = 12_{C_{10} } (0.60)^{10} (0.40)^{12-10}

                           

                          n_{C_{r} } = \frac{n!}{(n-r)!r!} = \frac{12!}{(12-10)!10!} = 66

                          P(X=10) = 66 X (0.60)^{10} (0.40)^{2} = 0.06385

<u><em>Final answer:</em></u>-

The probability that exactly 10 insects will die

                     P( X = 10 ) = 0.06385        

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Answer:

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Step-by-step explanation:

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13 x 14 = 182
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