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3 years ago

Mary was both 13th highest and 13th lowest in a spelling contest. how many people were in the contest?

1 answer:

8 0

This is the concept of median of statistical data, given that Mary was the 13th highest and the 13th lowest in the spelling contest it implies that the number of people was distributed as follows;
1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25
This implies that since the median of 25 is 13, then the total number of people in the contest was 25

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3 years ago

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A bag of marbles has 3 red, 4 blue, and 5 white marbles in it. What is the probability of reaching in and selecting a blue marbl

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Answer:

$P(B)=\frac{1}{3}$

Step-by-step explanation:

The number of red marbles in the bag is; $n(R)=3$ .

The number of blue marbles in the bag is; $n(B)=4$ .

The number of white marbles in the bag is; $n(W)=5$ .

The total number of marbles in the bag is: $n(S)=3+4+5=12$ .

The probability of selecting a blue marble is $P(B)=\frac{n(B)}{n(S)}$

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We simplify to obtain:

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2 years ago

Solve for x: 2 over 5 (x − 4) = 2x.<br><br> −8<br> negative 1 over 2<br> 1<br> −1

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3 years ago

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Step-by-step explanation:

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Answer:

Step-by-step explanation:

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