Question

help!

Answer 1

The number of chips of different colors in Fran's bag is shown below:

9 red chips
4 green chips
15 yellow chips
Fran takes out a chip from the bag randomly without looking. He replaces the chip and then takes out another chip from the bag. What is the probability that Fran takes out a green chip in both draws?
4 over 28 multiplied by 4 over 28 equal to 16 over 784
4 over 28 plus 4 over 28 equal to 8 over 56
4 over 28 multiplied by 3 over 27 equal to 12 over 756
4 over 28 plus 3 over 27 equal to 192 over 756

Answer 2

@Vocaloid

Answer 3

number of green chips/number of total chips = ?

Answer 4

i dont get it

Answer 5

number of green chips = ?

Answer 6

4

Answer 7

total number of chips = ?

Answer 8

4

Answer 9

read the problem again....

how many chips are there in total?

Answer 10

add all the colors together...

Answer 11

oh, 28

Answer 12

right, so number of green chips/number of total chips = ?

Answer 13

4/28

Answer 14

right. since he picks out two chips (with replacement) we multiply:

(4/28)*(4/28) = ?

Answer 15

0.02040816326

Answer 16

as a fraction, please...

Answer 17

ok

Answer 18

1/49

Answer 19

don't reduce the fraction

4*4 = ?

Answer 20

16

Answer 21

right, and 28*28 = ?

Answer 22

784

Answer 23

right, so (4/28)*(4/28) = 16/784, so our answer is...?

Answer 24

A!

Answer 25

right

Answer 26

ok next

Answer 27

Amelia rolls two fair number cubes numbered from 1 to 6. She first defines the sample space as shown below:

(1, 1), (1, 2), (1, 3), (1, 4), (1, 5), (1, 6)
(2, 1), (2, 2), (2, 3), (2, 4), (2, 5), (2, 6)
(3, 1), (3, 2), (3, 3), (3, 4), (3, 5), (3, 6)
(4, 1), (4, 2), (4, 3), (4, 4), (4, 5), (4, 6)
(5, 1), (5, 2), (5, 3), (5, 4), (5, 5), (5, 6)
(6, 1), (6, 2), (6, 3), (6, 4), (6, 5), (6, 6)

Based on the sample space, what is the probability of getting a total of 4?

6 over 36
5 over 36
4 over 36
3 over 36

Answer 28

look at each of the ordered pairs, and count how many add up to 4

Answer 29

what do u mean?

Answer 30

ok, the first pair is (1,1), and 1+1 = 2, right?
this doesn't add up to 4, so we ignore it and go to the next one, (1,2)...

Answer 31

ok

Answer 32

keep following the pattern and see how many pairs add up to 4

Answer 33

(1,3) = 4

Answer 34

right, keep going...

Answer 35

(2,2) and (3,1)

Answer 36

right, so we have 3 pairs out of 36, so our answer is 3/36

Answer 37

oh okay! next!

Answer 38

how many are there??

Answer 39

like 10

Answer 40

but they are quick ones :)

Answer 41

There are 5 cards with a picture of a rose and 3 cards with a picture of a daisy. Alia keeps all the cards down on a table with the pictures hidden and mixes them up. She then turns over one card and finds the picture of a rose on it. She removes this card from the table and turns over another card without looking. What is the probability that the card that Alia turns over has a rose on it?

4 over 7
5 over 8
5 over 7
4 over 5

Answer 42

how many roses does she begin with?

Answer 43

um, 1

Answer 44

read the problem again... how many roses are there at the beginning?

Answer 45

5

Answer 46

ok, after one gets taken away, how many are left?

Answer 47

3

Answer 48

no, please try again...

there are 5 to begin with, one gets taken away, how many are left?

Answer 49

4

Answer 50

right...

now, let's read the problem again. how many total cards are there at the begining?

Answer 51

5

Answer 52

total cards = roses + daisies = ?

Answer 53

8

Answer 54

right, so we start with 8, then we take one away, how many are left?

Answer 55

7

Answer 56

right, so our probability of getting a rose again is 4/7

Answer 57

ok so A?

Answer 58

yes

Answer 59

ok next!

Answer 60

Kate is playing a game at the school carnival. There is a box of marbles, and each box has a white, a green, a blue, and an orange marble. There is also a fair 2-sided coin. How many outcomes are in the sample space for pulling a marble out of the box and tossing the coin?

16
8
6
12

Answer 61

(number of colors)*(number of sides on a coin) = ?

Answer 62

what are the number of colors and number of sides on a coin

Answer 63

read the problem...

Answer 64

um 4 colors and 2 coins?

Answer 65

right, so (number of colors)*(number of sides on a coin) = ?

Answer 66

8

Answer 67

right.

Answer 68

ok next!

Answer 69

The table below shows the number of shirts of different colors in a closet:


Color of Shirt Number
Red 1
Blue 6
Green 1
Pink 4


A coin

Dennis selects a shirt from the closet randomly without looking. What is the probability that Dennis will select a pink shirt and the coin will land tails up?
5 over 6
3 over 6
4 over 24
2 over 24

Answer 70

(number of pink shirts)/(total number of shirts) = ?

Answer 71

48

Answer 72

/ means divide...

Answer 73

(4/12)*(1/2) = ?

Answer 74

1/3

Answer 75

let's leave it as 4/12 for now

(4/12)*(1/2) = ?

Answer 76

1/6

Answer 77

let's not simplify the fractions, ok?

4*1 = ?

Answer 78

4

Answer 79

and 12*2 = ?

Answer 80

24

Answer 81

right, so (4/12)*(1/2) = 4/24

Answer 82

ok

Amy makes the following statement:

"There is a 60% chance of snow tomorrow and a 10% chance I will be late for school."

What is the probability that it will snow and Amy will be late for school?

3%
6%
50%
70%

Answer 83

multiply the two probabilities together

Answer 84

(0.6)*(0.1) = ?

Answer 85

0.7

Answer 86

* means multiply...

Answer 87

(0.6)*(0.1) = ?

Answer 88

0.6

Answer 89

no, please try again...

what is 0.6 times 0.1? use a calculator if you are not sure...

Answer 90

0.06

Answer 91

right, now convert that to a percentage by multiplying by 100

0.06*100 = ?

Answer 92

6

Answer 93

right, so our final answer is 6%

Answer 94

ok next!

The table below shows the number of marbles of different colors in a bag:


Color of Marbles Number of Marbles
Pink 5
Blue 2
Green 3


Ursula draws a marble from the bag randomly without looking. She then draws another marble from the bag without replacing the first one. Which expression shows the probability of drawing green marbles in both the trials?
3 over 10 multiplied by 2 over 9
3 over 10 multiplied by 2 over 10
3 over 10 added to 2 over 9
3 over 10 added to 2 over 10

Answer 95

(number of green marbles) / (number of total marbles) = ?

Answer 96

3/10

Answer 97

right... that's the first marble.

now, we started with 3 green ones, how many are left after we take one away?

Answer 98

2