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Sholpan [36]
3 years ago
14

Helppppp pleaseeee grade 3 maths problem

Mathematics
1 answer:
ZanzabumX [31]3 years ago
7 0

Answer:

Number who walk to school = 16

Step-by-step explanation:

If there are 42 students, and 23 girls, there must be 19 boys since 19 + 23 = 42.

If ten girls walk to school, then there are 13 girls left to sort.

Since 7 of the 11 students on the bus are boys, that means 4 girls ride the bus too, so we have 9 girls left.

All we have left is cycling, so 9 girls must cycle to school.

Now, all we have to do is add 6 and 7 since 6 boys bike and 7 boys ride the bus. That equals 13 boys who do not walk.

19 boys total - 13 boys who dont walk = 6 boys that walk.

6 + 10 = 16

Number who walk to school = 16

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3 years ago
What is the probability that more than twelve loads occur during a 4-year period? (Round your answer to three decimal places.)
Nataly_w [17]

Answer:

Given that an article suggests

that a Poisson process can be used to represent the occurrence of

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occurring during that period is at most 0.3?Part A:The number of loads that can be expected to occur during a 4-year period is given by:Part B:The expected value of the number of loads to occur during the 4-year period is 10 loads.This means that the mean is 10.The probability of a poisson distribution is given by where: k = 0, 1, 2, . . ., 11 and λ = 10.The probability that more than 11 loads occur during a

4-year period is given by:1 - [P(k = 0) + P(k = 1) + P(k = 2) + . . . + P(k = 11)]= 1 - [0.000045 + 0.000454 + 0.002270 + 0.007567 + 0.018917 + 0.037833 + 0.063055 + 0.090079 + 0.112599 + 0.125110+ 0.125110 + 0.113736]= 1 - 0.571665 = 0.428335 Therefore, the probability that more than eleven loads occur during a 4-year period is 0.4283Part C:The time period that must be so that the probability of no loads occurring during that period is at most 0.3 is obtained from the equation:Therefore, the time period that must be so that the probability of no loads

occurring during that period is at most 0.3 is given by: 3.3 years

Step-by-step explanation:

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Step-by-step explanation:

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2 years ago
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</span>
6 0
2 years ago
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postnew [5]
O wholes
8 columns/ rows
3 small squares
8 0
2 years ago
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