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GenaCL600 [577]
2 years ago
10

a running relay team ran a 400 meter race in a record-setting time of 36 seconds.what was their average speed to the nearest ten

th of a meter per second?
Mathematics
1 answer:
s344n2d4d5 [400]2 years ago
7 0

Answer:

  1. 40<em><u>6</u></em><em><u>8</u></em><em><u>5</u></em><em><u>8</u></em><em><u>r</u></em><em><u>e</u></em><em><u>u</u></em><em><u>y</u></em><em><u>y</u></em><em><u> </u></em><em><u>igcbjiy469633</u></em>
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Each pencil cost 10 cents how many pencils can you buy if you have 18 dollars
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Assume that there are 22 frozen dinners: 12 pasta, 6 chicken, and 4 seafood dinners. The student selects 5 of them. What is the
Stells [14]

Since, there are 22 frozen dinners. Out of these, 22 are pasta, 6 chicken and 4 seafood dinners.

We have to determine the probability that at least 2 of the dinners selected are pasta dinner. At least 2 of the dinners selected are pasta, it means that there can be 2 pasta, 3 , 4 or 5.

So, Probability with at least 2 of dinners

= \frac{(^{12}C_{2} \times ^{10}C_{3})+ (^{12}C_{3} \times ^{10}C_{2})+(^{12}C_{4} \times ^{10}C_{1})+(^{12}C_{5})}{^{22}C_{5}}

We will use the combination formula, which states ^nC_r = \frac{n!}{r! (n-r)!}

= \frac{(66 \times 120)+(220 \times 45)+(495 \times 10)+(792)}{26334}

=\frac{7920+9900+4950+792}{26334}

= \frac{23562}{26334}

= 0.894

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Therefore, the probability that at least 2 of the dinners selected are pasta is 0.90

3 0
3 years ago
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4 years ago
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