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3 years ago

PLEASE HELP! I REALLY NEED AN ANSWER, I CAN'T FIGURE IT OUT!

Mathematics

1 answer:

uranmaximum [27]2 years ago

8 0

Answer:

$2 \frac{1}{4} - 1 \frac{3}{4} \\ \frac{(2 \times 4) + 1}{4} - \frac{(1 \times 4) + 3}{4} \\ \frac{8 + 1}{4} - \frac{4 + 3}{4} \\ \frac{9}{4} - \frac{7}{4} \\ \frac{9 - 7}{4} \\ \frac{2}{4} \\ \frac{1}{2}$

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The mean is 10,724.28.

Explanation:

The mean is all of the values divided by the number of values there are.

So what you have to do is add all of the numbers and divide it by the amount of numbers there are.

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Since there are 7 numbers, divide 75,070/7 and you get your mean, which is 10,724.28 rounded.

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3 years ago

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3 years ago

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3 years ago

A high school class consists of 7 seniors, 10 juniors, 12 sophomores, and 11 freshmen. Exactly 4 of the juniors are female,

jekas [21]

Answer:

1/13

Step-by-step explanation:

There exactly 7 seniors 10 Juniors, 12 sophomores and 11 freshman

in which 4 of the juniors are Female , and exactly 2 of the sophomores are male. Therefore,

10-4= 6 juniors are male

12-2 = 10 female sophomores

Total = 7+10+12+11= 40 students

P(male junior then female soph.)= $\frac{6}{40}\times\frac{10}{39}= \frac{1}{26}$

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3 years ago