Transcript You select a card at random. Without replacing the

Applications of Percent
CHAPTER 6 REVIEW
What percent of 67 is 33? If necessary,
round to the nearest tenth of a percent.
49.3%
Emma has already read 6 of 20 books
on her summer reading list. What
percent of the books on her list has she
read already?
30%
20 is 35% of what number? If
necessary, round to the nearest tenth.
57.1
The Mogul Runners ski club planned
a trip to Park City. Of the total
number of club members, 11 signed
up to go. If this is 25% of the club,
how many members does the ski club
have?
44 Members
Find the percent of decrease from
280 to 210. Round to the nearest
tenth of a percent if necessary.
25% Decrease
A toy store’s percent of markup is 35%.
A model train costs the store $100. Find
the markup.
$35
A sporting goods store pays $180 for
a rubber raft. The percent of markup
is 40%. Find the raft’s selling price.
$252
All swimming equipment is on sale
with a 35% discount. A snorkeling set
regularly sells for $60. Find the
discount.
$21 Discount
At the beginning of 1995, the town
of Canyon Ridge had 1,800 residents.
The rate of population growth after
that was 5% per year. What was the
population at the beginning of 1998?
1996: 1890
1997: 1984.5
1998: 2083.725
2084 Residents
You can order a skirt with the three
different lengths (knee, mid-calf,
ankle) and the four different colors
(navy, black, khaki, denim). Draw a
tree diagram to show the number of
choices. How many choices are there?
Knee
Mid-Calf
Navy Khaki black Denim
Ankle
Navy Khaki black Denim
Navy Khaki black Denim
Suppose a coin is tossed x times.
Write an expression to represent the
number of possible outcomes.
𝑥
2
Suppose you roll two number cubes
and pick a letter of the alphabet at
random. Find the probability you
roll 2 even numbers and pick one of
the vowels a, e, i, o, or u.
5
104
Jason and Kyle both choose a number
from 1 to 10 at random. What is the
probability that both numbers are odd
numbers greater than 4?
9
100
The light is broken on your room and
you’re getting ready for school. In
your sock drawer you have 8 white
socks, 4 red socks, and 4 blue socks.
You grab one sock out of the drawer,
but you can’t tell what color it is. You
decide to grab another sock and walk
into the next room to see if you have
a pair the same color. What is the
probability both socks are blue?
1 3
1
×
=
4 15 20
Two urns each contain green balls
and blue balls. Urn I contains 4 green
balls and 6 blue balls, and Urn II
contains 6 green balls and 2 blue
balls. A ball is drawn at random from
each urn. What is the probability that
both balls are green?
4 6
3
× =
10 8 10
Find the probability that 3 students chosen
at random were all born on a Wednesday.
1
343
A local weather forecaster is accurate
85% of the time when predicting rain
for the day. What is the probability that
she will make correct rain predictions 3
days in a row? Round to the nearest
whole percent.
61%
M
A
T
H
E
M
A
T
I
C
S
You select a card at random. Without
replacing the card, you select a
second card. Find P(M, then H)
1
55
M
A
T
H
E
M
A
T
I
C
You select a card at random.
Without replacing the card, you
select a second card.
Find P(T, then a vowel).
S
4
55
M
A
T
H
E
M
A
T
I
C
You select a card at random.
Without replacing the card, you
select a second card.
Find P(C, then T or S).
S
3
110
The Math Club operates a concession stand during
special school events. One of their best-selling items is
packaged fruit snacks. They buy cases of 36 individual
bags of the snacks. Each case costs $9.00.
a. The percent markup for the snacks is 40%. What is
the selling price of one individual bag of fruit snacks?
b. During the holiday concert, the profit from the sale
of the fruit snacks was $8.50. How many bags of fruit
snacks did they sell? Explain how you found the number
of bags sold.
a.$0.35
b.85 packages