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creativ13 [48]
4 years ago
13

The ratio of red marbles to blue marbles is 3:5. If there are 225 blue marbles total in the collection, how many of each color a

re there? Please show your work.
Mathematics
1 answer:
ziro4ka [17]4 years ago
8 0

Answer:

Red balls =  84     Blue balls =  140

Step-by-step explanation:

Ok so there are 225 marbles

And ratio here is Red : Blue = 3 : 5

So Red marbles = 3x whereas Blue marbles = 5x

Therefore,

3x + 5x = 225

8x = 225

x = 28.125 = 28

<u>Red balls = 28*3 = 84     Blue balls = 28*5 = 140</u>

(Pls check whether total no of balls is 224)

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3 years ago
According to the CDC, the rate of Cesarean births in the United States in 2013 was about 33%. Suppose a random sample of 200 bir
sergij07 [2.7K]

Answer:

n = 200

p = 0.33.

Step-by-step explanation:

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

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In which C_{n,x} is the number of different combinations of x objects from a set of n elements, given by the following formula.

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7 0
3 years ago
Twice the sum of consecutive numbers n and n + 1 is 510. What is the smaller number?
guajiro [1.7K]

Answer:

The smaller number is 127

Step-by-step explanation:

Lets write the given problem in equation form

sum of consecutive numbers n and n + 1 = n + n + 1 = 2n + 1

now we find twice of the sum of consecutive numbers n and n + 1

2*(2n + 1) = 4n + 2

given that

twice the sum of consecutive numbers n and n + 1 is 510

thus,

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=> 4n = 510 -2 = 508

=> n = 508/4 = 127

Thus, the numbers are n = 127

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4 0
3 years ago
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3 years ago
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