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4vir4ik [10]
4 years ago
9

A class is made up of 8 boys and 7 girls. Half of the boys wear glasses. A student is selected at random from the class. What is

the probability that the student is a boy with glasses? Write your answer as a fraction in simplest form.
Mathematics
1 answer:
Harlamova29_29 [7]4 years ago
4 0

4 out of 15 is the probability.

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A number cube is rolled 120 times. The number 4 comes up 47 times. What is the experimental probability of rolling a 4? What is
anzhelika [568]

A number cube is rolled 120 times. The number 4 comes up 47 times.

We have to determine the experimental probability of rolling a 4.

The formula to evaluate probability of an event is given by:

Probability  = \frac{Favourable outcomes}{Total outcomes}

So, Probability of rolling a 4 = \frac{ Total number of times when 4 appears}{Total number of times number cube rolled}

= \frac{47}{120}

Now, we have to find the theoretical probability of rolling a 4.

Total number of outcomes of number cube = {1,2,3,4,5,6}

Probability of rolling a 4 = \frac{1}{6}

So, Option B is the correct answer.

5 0
3 years ago
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you are making beaded bracelets for your for your friends. you want to use 30 beads for each bracelet want to use no more than 1
Softa [21]

30(x)<=145 and yes she would be able to make 4 bracelets because 30 x 4 = 120 and that is less than 145

5 0
4 years ago
Simplify 24 − (23 + 22).
andre [41]

Answer:

I don't know where those choices are from but the answer is -21.....

Step-by-step explanation:

24 − (23 + 22)

24-23-22

-21

3 0
3 years ago
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5 mathematical examples of the additive inverse,performing any calculations to explain why it is an example of the additive inve
daser333 [38]
The additive inverse is zero. The addtive inverse property states that any number added or subtracted to zero give the same number.

Examples:
0 + 3 = 3
1 - 0 = 1
-8 + 0 = -8
-3 - 0 = -3
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5 0
3 years ago
I need help in this problem 8v+w+7-8v+2w
vaieri [72.5K]
By using combine like terms,

<span>8v+w+7-8v+2w

8v-8v+2w+w+7

2w+w+7

3w+7

The answer for this problem is 3w+7</span>
5 0
3 years ago
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