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7th grade math questions help me!!!!!!!!!!!?

i’m horrible at math sombody help me out here plz:Out of a pool of 5 people, a team of 4 will be randomly selected to work on a project. What is the probability that you and 3 particular friends in the pool of people will be on the same team? and this other one:In a random sample of 300 customers at a fast food restaurant, it was determined that 132 customers ordered a salad. If the restaurant typically has 1000 customers in a day, how many of these customers will probably order a salad?

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Please do not ever say you are horrible at math. No one is. Either someone scared you unnecessarily or taught you badly.

Now, for your first problem, here’s how you organize it.

Let’s say you are A and your three friends are B, C, and D. The fifth person in the pool would be E. This is a small enough number that you could actually write down all the possible combinations. (You could mix up the letters, but the team would be the same regardless of what order they are chosen in.)

ABCD

ABCE

ACDE

BCDE

Out of the four possible teams that could be picked, only one includes you and your three friends. So now can you see what is the probability that A, B, C and D will be on the same team?

In the second one, you need to know what percentage 132 is of 300. You can use a calculator to find out what is 132 divided by 300. Then multiply that percentage times 1000 to find out how many customers will probably order a salad. To check and make sure that your answer makes sense, realize that 132 is under half of 300, so the right answer will be under half of 1000.

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5 years ago
Anonymous
to make it easier, you can times both the numbers by 100 to get rid of the decimal place. so the equation becomes: 350 / 133 now that should be a little easier. you still need to use the long division method. anyway 133 goes into 350 2 times, with a remainder of 84 (84/133) which is 12/19 so the answer is either 2 and 12/19 or 2. 6 (1 decimal place)
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bailey
THE ANSWER TO THE SECOND ONE IS 440
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