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mrs_skeptik [129]
3 years ago
9

The probability that any child in a certain class travels to school by bus is 2/5. If 4 children from the class are selected ata

random, what is the probability 1. none of them travels to school by bus 2. three of then travel to school by bus 3. at least one of them travels to school by bus?
Mathematics
1 answer:
RUDIKE [14]3 years ago
3 0
Hmmm i would have to say 25 percent
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iogann1982 [59]

Answer:

It equals 3

Step-by-step explanation:

To solve this it is basically like a normal problem you would just take out the X in it and divide 7 by 21 which leaves you with 3.

7 0
2 years ago
A librarian has 4 identical copies of Hamlet, 3 identical copies of Macbeth, 2 identical copies of Romeo and Juliet, and one cop
lesantik [10]

Answer:

The number of distinct arrangements is <em>12600</em><em>.</em>

Step-by-step explanation:

This is a permutation type of question and therefore the number of distinguishable permutations is:

n!/(n₁! n₂! n₃! ... nₓ!)

where

  • n₁, n₂, n₃ ... is the number of arrangements for each object
  • n is the number of objects
  • nₓ is the number of arrangements for the last object

In this case

  • n₁ is the identical copies of Hamlet
  • n₂ is the identical copies of Macbeth
  • n₃ is the identical copies of Romeo and Juliet
  • nₓ = n₄ is the one copy of Midsummer's Night Dream

Therefore,

<em>Number of distinct arrangements =  10!/(4! × 3! × 2! × 1!)</em>

<em>                                                         = </em><em>12600 ways</em>

<em />

Thus, the number of distinct arrangements is <em>12600</em><em>.</em>

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Fill in the missing numbers in these equations
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Which scenario depicts two independent events?
LenKa [72]

Answer:

c

Step-by-step explanation:

3 0
3 years ago
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What is the focus of the parabola given by `-(1)/(4)(y + 2)^2 = (x −1)`? A. (-1, 2) B. (1, -2) C. (0, -2) D. (0, 2)
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The correct answer is that the focus is, <u><em>(0,−2)</em></u>

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3 years ago
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