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Rainbow [258]
3 years ago
8

Janet is 48 in tall and Lucy her younger sister is 32 in tall at 2:30 in the afternoon Lucy's Shadow extends 34 in how far does

Janet's Shadow extend at 2:30 in the afternoon
Mathematics
1 answer:
Elis [28]3 years ago
5 0
Janet is 50inches tall.
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Six Republicans and four Democrats have applied for two open positions on a planning committee. Since all the applicants are qua
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\displaystyle P=\frac{7}{15}=0.467

Step-by-step explanation:

<u>Probabilities</u>

When we choose from two different sets to form a new set of n elements, we use the so-called hypergeometric distribution. We'll use an easier and more simple approach by the use of logic.

We have 6 republicans and 4 democrats applying for two positions. Let's call R to a republican member and D to a democrat member. There are three possibilities to choose two people from the two sets: DD, DR, RR. Both republicans, both democrats and one of each. We are asked to compute the probability of both being from the same party, i.e. the probability is

P=P(DD)+P(RR)

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For P(RR) we proceed in a similar way to get \binom{6}{2} different ways.

The total ways to select both from the same party is

\displaystyle \binom{4}{2}+\binom{6}{2}=4+15=21

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\displaystyle P=\frac{21}{\binom{10}{2}}

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3 0
3 years ago
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