4 years ago

What is the radius of a circle with an area of 123 square feet

Mathematics

1 answer:

lora16 [44]4 years ago

4 0

$r = \sqrt{ \frac{a}{\pi} }$
6.25 feet. The formula is:

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The probability of an event - picking teams. About (a) 10 kids are randomly grouped into an A team with five kids and a B team w

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Answer: The required probability is $\dfrac{4}{9}$

Step-by-step explanation:

Since we have given that

Number of kids = 10

Number of kids in Team A = 5

Number of kids in Team B = 5

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So, number of favourable outcome is given by

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Total number of outcomes is given by

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So, the probability that Alex ends up on the same team with at least one of his two best friends is given by

$\dfrac{2(\dfrac{8!}{5!\times 3!)}}{\dfrac{10!}{5!\times 5!}}\\\\=2\times \dfrac{8!}{3!}\times \dfrac{5!}{10!}\\\\=\dfrac{4}{9}$

Hence, the required probability is $\dfrac{4}{9}$

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