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swat32
3 years ago
11

Item 20The width of a rectangular room is 60% of its length. The length of the room is 10 feet. What is the area of the room?

Mathematics
1 answer:
AnnZ [28]3 years ago
4 0
60% of 10 is 6, so 10x6 is the area which is 60ft^2

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In a statistics class of 13 sophomores, 12 juniors, and 8 seniors, 5 of whom are male sophomores, 6 of whom are female juniors,
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Answer:

\frac{20}{33}

Step-by-step explanation:

We are given that

Sophomores=13

Juniors=12

Seniors=8

Male sophomores=5

Female sophomores=6

Male seniors=4

We have to find the probability of randomly selecting a junior or  a senior.

Total persons=13+12+8=33

Let A=Seniors

B=Juniors

Probability,P(E)=\frac{number\;of\;favorable\;cases}{total\;number\;of cases}

Using the formula of probability

P(A)=\frac{8}{33}

P(B)=\frac{12}{33}

A\cap B=0

P(A\cap B)=0

P(A\cup B)=P(A)+P(B)-P(A\cap B)

P(A\cup B)=\frac{8}{33}+\frac{12}{33}

P(A\cup B)=\frac{8+12}{33}=\frac{20}{33}

Hence, the probability of selecting a junior or senior=\frac{20}{33}

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2 times a month is how much he does it
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Vedmedyk [2.9K]

Answer:

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Step-by-step explanation:

1. To find the least common denominator, you need to find the least common multiple of the two denominators which are 6 and 15. Prime factorization of these numbers gives:

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Thus 30 is the least common denominator.

2. Now we need to somehow change both fractions to make them have a denominator of 30. To do this we can multiply by fractions with same numerator and denominator since that would be like multiplying by 1.

So, 5/6 x 5/5 = 25/30

And 14/15 x 2/2 = 28/30

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