expected number,value means what

Note by Srinivasarao Kakulapati
8 years ago

No vote yet
2 votes

  Easy Math Editor

This discussion board is a place to discuss our Daily Challenges and the math and science related to those challenges. Explanations are more than just a solution — they should explain the steps and thinking strategies that you used to obtain the solution. Comments should further the discussion of math and science.

When posting on Brilliant:

  • Use the emojis to react to an explanation, whether you're congratulating a job well done , or just really confused .
  • Ask specific questions about the challenge or the steps in somebody's explanation. Well-posed questions can add a lot to the discussion, but posting "I don't understand!" doesn't help anyone.
  • Try to contribute something new to the discussion, whether it is an extension, generalization or other idea related to the challenge.
  • Stay on topic — we're all here to learn more about math and science, not to hear about your favorite get-rich-quick scheme or current world events.

MarkdownAppears as
*italics* or _italics_ italics
**bold** or __bold__ bold

- bulleted
- list
  • bulleted
  • list

1. numbered
2. list
  1. numbered
  2. list
Note: you must add a full line of space before and after lists for them to show up correctly
paragraph 1

paragraph 2

paragraph 1

paragraph 2

[example link](https://brilliant.org)example link
> This is a quote
This is a quote
    # I indented these lines
    # 4 spaces, and now they show
    # up as a code block.

    print "hello world"
# I indented these lines
# 4 spaces, and now they show
# up as a code block.

print "hello world"
MathAppears as
Remember to wrap math in \( ... \) or \[ ... \] to ensure proper formatting.
2 \times 3 2×3 2 \times 3
2^{34} 234 2^{34}
a_{i-1} ai−1 a_{i-1}
\frac{2}{3} 23 \frac{2}{3}
\sqrt{2} 2 \sqrt{2}
\sum_{i=1}^3 ∑i=13 \sum_{i=1}^3
\sin \theta sin⁡θ \sin \theta
\boxed{123} 123 \boxed{123}

Comments

expected number,value means what

srinivasarao kakulapati - 8 years ago

It is the weighted mean of all possible values. Suppose in some event, the values that can come are 3,3,3,1,1,1,1,1,5,6,7,7,7,8,90,28,4,43,3,3,1,1,1,1,1,5,6,7,7,7,8,90,28,4,4. Then the expected value is

3∗3+1∗5+5+6+7∗3+8∗1+90∗1+28∗1+4∗218=18018=10\frac {3*3+1*5+5+6+7*3+8*1+90*1+28*1+4*2}{18} = \frac {180}{18}= 10.

Note that the expected value(number, moves) maybe a fraction, although it might not be practically possible to have the value a fraction.

Shourya Pandey - 8 years ago
×

Problem Loading...

Note Loading...

Set Loading...