A roller coaster can accommodate 346 rider in 20 minutes. How many riders could ride in 90 minutes?

Mathematics

2 answers:

dem82 [27]4 years ago

7 0

All you have to do is 90 divided by 20 and the answer of that muiltply by 346

Maslowich4 years ago

7 0

Answer:

1557 people

Step-by-step explanation:

If 346 can ride a roller coaster in 20 minutes then just do

346 times 4

which would equal 1384

then you do 1384 plus 173 (which would be half of 346)

Which equals 1557

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Suppose I pick a jelly bean at random from a box containing two red and ten blue ones. I record the color and put the jelly bean

Lubov Fominskaja [6]

Answer:

The probability of getting a red jelly bean both of the times is 0.028.

Step-by-step explanation:

First we have that in the box are 12 jelly beans having 2 red and 10 blue. The probability of getting one of the red jelly beans are the sum of the probability of the 2 red jelly beans, that is:

$ProbabilityRed=\frac{1}{12} +\frac{1}{12}=\frac{2}{12}$

Now we can calculate the probability of getting the red jelly bean twice, this will be the product of the probability of getting each one, is the same probability for the second chance because we are getting the jelly bean back in the box, this is:

$ProbabilityBothRed=\frac{2}{12} *\frac{2}{12}=\frac{4}{144} =\frac{1}{36} =0.028$