Question

70 percent of students at a certain school wear neither a ring nor a necklace. 15 percent wear a ring and 25 percent wear a necklace. If one of the students is chosen randomly, what is the probability that this student is wearing (a) a ring or a necklace? (b) a ring and a necklace?

Answer #1

(a)Probability a ring or a necklace =0.30

(b)Probability a ring and a necklace =0.10

It is known that 20% of female students at certain school wear a
ring, 30% of female students at this school wear a necklace, and
10% of female students wear both a ring and a necklace.
The probability that a randomly selected female student at this
school wears a ring or a
necklace or both is __________
The probability that a randomly selected female student at this
school wears a ring given
that this student wears a necklace is___________
The...

An advertising agency surveys a random sample of women aged
18-30. Suppose that 40% of respondents indicated that they wore
neither a ring nor a necklace to work. If 50% of the women who
responded wear a ring, and 20% wear a necklace, then (a) what
percentage wear some form of jewelry (a ring or a necklace)? (b)
what percentage wear both forms of jewelry (a ring and a necklace)?
(c) what percentage of students wearing a necklace also wear...

2.1: The probability that a visit to a local restaurant results
in neither buying an appetizer nor a dessert is 55%. Of those
coming to the restaurant, 25% buy an appetizer and 30% buy dessert.
What is the probability that a visit leads to buying both an
appetizer and dessert?
2.2: In a high school class, 35% of the students take Spanish as
a foreign language, 15% take French as a foreign language, and 40%
take at least one of...

In a certain high school, uniforms are optional. A study shows
that high school students who wear uniforms have a lower grade
average than students who don't wear uniforms. From this study, the
school administration claims that they should not require the
students to wear uniforms because that is the cause of the lowering
grades. Another possible explanation is that students who wear
uniforms are poorer than the students who don't wear uniforms and
the economic situation of their parents...

At a certain college, 85% of the students use Facebook, 20% use
Twitter, and 35% use Instagram. A
small portion of 5% of students do not use neither Facebook nor
Twitter.
a) What is the probability that a randomly chosen student at the
college uses both Facebook and
Twitter?
b) What is the probability that a randomly chosen student at the
college uses Facebook but not Twitter?
c) Show that in general, for any two events E and F in...

In a certain state, 30% of students will take an AP class, 40%
of students will play a school sport, and 15% of students will do
both. If we randomly selected a student, find the following:
(a) the probability the student will play a sport, but not take
an AP class.
(b) the probability the student will play a sport, given the
student takes an AP class.
(c) the probability the student plays a sport or takes an AP
class....

in a certain algebra 2 class of 28 students 14 play basketball
and 19 play baseball. there are 5 students who play neither sport.
what is the probability that a student chosen randomly from the
class plays basketball or baseball?

In a survey, 25 students are asked if they like vanilla ice
cream or chocolate ice cream. 14 students like vanilla flavor, 17
students like chocolate
flavor, and 8 answer like both.
(a) [1] What is the probability that a randomly selected student
likes vanilla or chocolate flavor?
(b) [1] What is the probability that a randomly selected student
likes neither vanilla nor chocolate flavor?
(c) [2] A student who likes chocolate ice cream is chosen at
random, find the...

An elementary school is offering 3 language classes: one in
Spanish, one in French, and one in German. These classes are open
to any of the 101 students in the school. There are 33 in the
Spanish class, 33 in the French class, and 23 in the German class.
There are 14 students that are in both Spanish and French, 7 are in
both Spanish and German, and 8 are in both French and German. In
addition, there are 4...

Problem corrected, please show all work!
In a small college of 1800 of the 6000 students are Female.
Additionally, 1200 of the 4500 students under the age of 25 are
Female. Answer the following questions: (a) What is the probability
of the student body is either Male or under the age of 25? (b) What
is the probability that a randomly selected student is Under 25,
given that the student is Male?, (c) What is the probability that
the randomly...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 6 minutes ago

asked 6 minutes ago

asked 27 minutes ago

asked 52 minutes ago

asked 54 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago