Transcript Answer

MSM II
Quarter 4 Review
Created by: Math Department
Mayfield Woods Middle School
Kevin Longo MIST
Probability
• 15 boys and 10 girls put their names in
a box for a chance to get front row sets
at Heavy D’s concert. 2 names are
drawn without being replaced. What is
the probability a boy’s name is drawn
followed by a girl’s name?
Answer is
• 1/4
• 0.25
• 25%
Probability
• There is a 75% chance of snow today.
There is a 30% chance of snow
tomorrow. What is the probability of it
snowing both days?
Answer is
• 22.5%
• 0.225 or 0.23
• 9/40
Probability
• When rolling a standard number cube
two times, what is the probability of
rolling an odd number and then the
number 4?
Answer is
• 1/12
• 0.083
• 8.3%
Probability
• What is the probability of rolling an 8
sided die and getting an 8 and then
tossing a coin and getting tails?
Answer is
• 1/16
• 0.0625 or 0.06
• 6.25%
Probability
• You have 16 cards numbered 1 to 16 in
a bag. Without replacing the cards,
what is the probability of drawing a 5
and a multiple of 3?
Answer is
• 1/48
• 0.021
• 2.1%
Probability
• What is the probability of rolling an odd
number on an 8 sided die and tossing a
coin and getting tails?
Answer is
• 1/4
• 0.25
• 25%
Probability
• A piggy bank contains 5 quarters, 2
dimes, and 6 nickels. When the piggy
bank is shaken, two coins fall out. What
is the probability that one is a dime and
the other is a nickel?
Answer is
• 1/13
• 0.077
• 7.7%
Experimental Probability
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Numbers Frequency
1
2 The table shows the
2
5 results of rolling of a
3
7 5 sided die 25 times.
4
6 What is the probability
5
5 of rolling a number
»
greater than 3?
Answer is
• 11/25
• 0.44
• 44%
Charts
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City
Union City
Timburg
Fairway
Waxfair
Meadville
17 miles
53 miles
30 miles
95 miles
Dubois
62 miles
24 miles
84 miles
66 mles
• How much further is the distance from Waxfair to Meadville than
the distance from Waxfair to Dubois?
Answer is
• Waxfair to Meadville - 95 miles
• Waxfair to Dubois - 66 miles
• 95 - 66 = 29 miles
Chart
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City
Union City
Timburg
Fairway
Waxfair
Meadville
17 miles
53 miles
30 miles
95 miles
Dubois
62 miles
24 miles
84 miles
66 mles
• Suppose you traveled from Union City to Dubois and then from
Dubois to Fairway. How many miles would you travel?
Answer is
• Union City to Dubios --62 miles
• Dubios to Fairway -- 84 miles
• 62 + 84 = 146 miles
Circle Graph
• What percent of the budget goes for
rent and clothes?
QuickTime™ and a
TIFF (U ncompressed) decompressor
are needed to see this picture.
Answer is
• Clothes 15%
• Rent 25 %
• 25 + 15 = 40%
Circle Graph
• What percent of budget is not for
clothes?
QuickTime™ and a
TIFF (U ncompressed) decompressor
are needed to see this picture.
Answer is
• Clothes 15%
• 100 - 15 = 85%
A group of 300 students were surveyed about their
favorite snack food. The table below shows the
results.
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Food Number of Students
Chips
132
Pretzels
38
Yogurt
50
Fruit
20
Popcorn
60
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Based on the results, what is the probability that a student would
choose yogurt as his or her favorite snack? Round to the nearest
whole percent.
Answer is
• 50 ÷ 300 = 0.166
• Convert 0.166 to 16.6%
• Round 16.6% to 17%
Counting Principle
• Determine the total number of outcomes
if you toss a six-sided die and spin the
spinner below.
2
3
1
4
2
5
6
2
Answer is
• 6 sided die-----6
• 8 section spinner ----8
• 6 x 8 = 48
Probability
• In one suitcase you have 2 black t-shirts, 3 blue tshirts, and 5 white t-shirts. In another suitcase you
have 5 pairs of jeans, 9 pairs of shorts, and 6 pairs
of khakis. What is the probability in decimal form
that you will select a blue t-shirt from the first
suitcase and a pair of khakis from the other
suitcase?
Answer is
• Blue T-Shirt 3/10
• Khakis 6/20
• 3/10 x 6/20 = 18/200
• 18 ÷ 200 = 0.09
Box & Whisker Plot
• What percent of the data is between 62 and 85?
QuickTime™ and a
decompressor
are needed to see this picture.
Answer is
• 50%
• That is what is called thinking inside of
the box!
Box & Whisker Plot
• What is the Upper Quartile?
QuickTime™ and a
decompressor
are needed to see this picture.
Answer
• Between 80 and 90
• Score of 85
Probability
• You have 16 cards numbered 1 t0 16 in
a bag. What is the probability of
drawing a 8 and a multiple of 3 without
replacing the cards?
Answer is
• 8 - 1/16
• Multiple of 3 - 3,6,9,12,15 - 5/15
• 1/16 x 5/15 = 1/48
Box & Whisker Plot
• These data represent the score on a
Biology quiz.
• 46 26 34 48 37 45 38 50
• 47 33 45 41 45 45 37 22
• Make a Box & Whisker plot of the data.
Answer is
• 20 25 30 35 40 45 50 55
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Scatter Plot
• What was the forecasted temperature when the observed
temperature was 20 degrees?
Answer is
• 20 degrees
Study