Waste less time on Facebook — follow Brilliant.
×

Probability

Hi guys! Some people in our class are wondering if conditional probability can be used in this problem. Can you please give clarification to the problem? Thank you!

In a senior year of a high school graduating class of 100 students, 42 studied mathematics, 68 studied psychology, 54 studied history, 21 studied both mathematics and history, 25 studied mathematics and psychology, 7 studied history but neither mathematics nor psychology, 10 studied all the subjects, and 8 did not take any of the three. If a student is selected at random, find the probability that.....

a person is not taking psychology is taking both history and mathematics.

Note by Charlene Lim
8 months, 2 weeks ago

No vote yet
1 vote

  Easy Math Editor

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 \( 2 \times 3 \)
2^{34} \( 2^{34} \)
a_{i-1} \( a_{i-1} \)
\frac{2}{3} \( \frac{2}{3} \)
\sqrt{2} \( \sqrt{2} \)
\sum_{i=1}^3 \( \sum_{i=1}^3 \)
\sin \theta \( \sin \theta \)
\boxed{123} \( \boxed{123} \)

Comments

Sort by:

Top Newest

No conditional probability needed. Just draw a Venn diagram and the answer should follow.

Pi Han Goh - 8 months, 2 weeks ago

Log in to reply

×

Problem Loading...

Note Loading...

Set Loading...