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sergiy2304 [10]
3 years ago
10

Jean's scores on the first three of four 100-point tests were 82, 86, and 91. what score must she receive on the fourth test to

have an average of at least 87 points for all the tests
Mathematics
1 answer:
monitta3 years ago
5 0

The total for an average to be 87 would have be 87 x the number of tests or 87 x 4 = 348.

Let's see the total for her previous 3: 82 + 86 + 91 = 259

The 4th one needs to take her from 259 to 348.

348 - 259 = 89. she has 89 'to go" to get that 87 average.

She requires an 89 to achieve an 87 test average.

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suppose we want to choose 5 letters, without replacement, from 13 distinct letters. (a) how many ways can this be done, if the o
CaHeK987 [17]

A. The number of possible ways can this be done, if the order of the choices is not taken into consideration is 1, 287 ways

B. The number of possible ways can this be done, if the order of the choices is taken into consideration is 154,440 ways

<h3>What is meant by permutation and combination?</h3>

Combination and permutation are two alternative strategies in mathematics to divide up a collection of components into subsets. The subset's components can be listed in any order when combined. The components of the subset are listed in a permutation in a certain order.

A. We want to select 5 objects from a total 13, without considering the order in which they are chosen.

The correct way to do this exists by utilizing the combination formula since order exists not considered;

Therefore, we have ; 13 C 5 read as 13 combination 5;

Let the equation of combination be n C r = n!/(n-r)!r!

substituting the values in the above equation, we get

13!/(13-8)!8! = 13!/5!8! = 1,287 ways

B. By considering order, we shall be using the permutation formula;

Let the equation of permutation be n P r = n!/(n-r)!

substituting the values in the above equation, we get

13 P 5 = 13!/(13-5)!

= 13!/(13-5)! = 13!/8! = 154,440 ways

To learn more about permutation and combination refer to:

brainly.com/question/11732255

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3 0
1 year ago
Which interval for the graphed function contains the local maximum?
Nonamiya [84]

Answer:

[0,2]


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6 0
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A triangle solver can quickly show you the third side is 14 cm.

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