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bazaltina [42]
3 years ago
12

in a group of 120 people,90 of them are 30 years old or older. Everyone else in the group is younger than 20 years old. If a per

son is selected at random, what is the probability the person is less than 20 years old
Mathematics
1 answer:
Ksju [112]3 years ago
3 0
36% chance of the person being less than 20 years okd
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On a separate piece of paper, draw the different ways you can divide the given shape into simpler shapes. Describe each result.
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A scuba diver is 12 meters below sea level. If the diver descends 39 meters further, what integer represents the scuba diver’s n
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3 years ago
As every Girl Scout knows, statistics teachers seriously love Girl Scout Cookies. The number of boxes of GS cookies statistics t
Alexandra [31]

Answer:

a) 0.75

b) 0.0625

c) 0.1875

d) 0.375

Step-by-step explanation:

Let's start by first finding the probability a teacher orders 6 boxes. Since it is a four sided dice, the probability of getting a 1 is going to be 0.25.

Similarly, for any other number on the dice, the teacher orders 2 boxes. We can think of this as NOT rolling a 1. Using our previous answer, this comes out to be: 1 - 0.25 = 0.75

It should be remembered in the following answers that teachers ordering 6 or 2 boxes are not influenced by the results of other teachers. These are statistically independent events.

a) As given above, this probability is 0.75

b) The probability that both teachers order 6 boxes will be their individual probabilities multiplied. This comes out to be: 0.25 x 0.25 = 0.0625

c) Like in part (b), this is both of their probabilities multiplied:

   0.25 x 0.75 = 0.1875

d) This is nearly the same as part (c), but with a little twist. The order matters. There are two scenarios:

  1.   First teacher gets 6 boxes, and the second gets 2.
  2.   First teacher gets 2 boxes, and the second gets 2.

Both of these events have a probability of 0.1875, as shown in (c). To get the total probability of this event happening, we must add these together:

0.1875 + 0.1875 = 0.375

4 0
3 years ago
What is the simplest form of 6/27?
aivan3 [116]
The fraction 6/27 is equivalent1 to 2/9.

This is a proper fraction once the absolute value of the top number or numerator (6) is smaller than the absolute value of the bottom number or denomintor (27).
8 0
3 years ago
The probability that it'll rain tomorrow in Ohio is 30%
VLD [36.1K]
It raining in Alaska and raining in Ohio are independent events. One does not control the other or affect the other in any way.

For two independent events (let's call them A and B), the Probability of A and B both occurring is given by P(A and B) = P(B) x P(B).

For this problem, let A = rain in Ohio and B= rain in Alaska.

P(A and B) = P(A) x P(B)
\frac{12}{100} =(P(A))( \frac{3}{10} )

( \frac{12}{100}) ( \frac{100}{30} )=P(A)
P(A)= \frac{12}{30}= \frac{2}{5}
8 0
3 years ago
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