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djverab [1.8K]
2 years ago
10

Emily has 12 fruits in her bowl. She has 3 apples, 5 bananas, 1 pear and 3 oranges. A fruit is selected at random. What is the p

robability that the fruit is an orange or a pear? A. 56 B. 23 C. 12 D. 13
Mathematics
1 answer:
blsea [12.9K]2 years ago
5 0

Answer: The probability that the fruit is an orange or a pear is \dfrac{1}{3} .

Step-by-step explanation:

Given : Emily has 12 fruits in her bowl.

She has 3 apples, 5 bananas, 1 pear and 3 oranges.

A fruit is selected at random.

P(orange)  = \dfrac{\text{Number of oranges}}{\text{Total fruits}}

=\dfrac{3}{12}

P(pear)= \dfrac{\text{Number of pears}}{\text{Total fruits}}

=\dfrac{1}{12}

Since both events of selecting orange and pear are mutually exclusive , so

The probability that the fruit is an orange or a pear = P(orange) + P(pear)

=\dfrac{3}{12}+\dfrac{1}{12}=\dfrac{4}{12}=\dfrac{1}{3}

Therefore , the probability that the fruit is an orange or a pear is \dfrac{1}{3} .

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Calculati suma n+p stiind ca mn+mp=147si m =7
Anuta_ua [19.1K]

Answer:  

n+p=21


Step-by-step explanation:

7n+7p=147si

7(10.5) +7(10.5)=147si

73.5+73.52=147si


8 0
2 years ago
Norma received 1 penny on the first day of the month, and each day after that, she received triple the number of pennies that sh
hjlf

note that this isn't a summation problem, it just wants to find on what day will she get 10,000,000 dollars in 1 day

convert that the pennies to make it easier (100 pennies=1 dollar so that's 1,000,000,000 or a billion pennies) (note that 1,000,000,000=10^9)

each day is 3 times of the other

first day is 1, 2nd is 1*3, 3rd day is 1*3*3, 4th day is 1*3*3*3, etc

hmm, so after n days, the number of pennies is 1*3^{n-1}

one long way is to keep dividing by 3 to find how many times we need to do that to find n

easier way is to do this:

1,000,000,000=3^{n-1}

take ln of both sides

ln(1,000,000,000)=ln(3^{n-1})

ln(10^9)=ln(3^{n-1})

use properties of logarithms

9ln(10)=(n-1)ln(3)

divide both sides by ln(3)

\frac{9ln(10)}{ln(3)}=n-1

add 1 to both sides

\frac{9ln(10)}{ln(3)}+1=n

using your calculator we get 19.863=n

so after 19.863 days

but we need a whole number of days so round up to 20

20 days

it will be on day 20 of the month

4 0
2 years ago
Read 2 more answers
If value of cos330° is √3/2 then find tan165°.
Umnica [9.8K]

Answer:

-2+sqrt(3)

Step-by-step explanation:

When cos(angle)=sqrt(3)/2

then sin(of that angle)= + or - 1/2 depending on the quadrant

Anyways 330 degrees is in the 4 quadrant.  Cosine is positive there while sine is negative.

so sin(330)=-1/2

Formula for tan(x/2)=(1-cos(x))/sin(x)

Therefore  tan(165)=tan(330/2)=(1-cos(330))/sin(330)=(1-sqrt(3)/2)/(-1/2)

Multiply top and bottom by 2 to get

tan(165)=(2-sqrt(3))/-1

tan(165)=-2+sqrt(3)

3 0
2 years ago
An experiment reported in Popular Science compared fuel economies for two types of similarly equipped diesel mini trucks. Let us
expeople1 [14]
I don’t really understand this question so I will try to figure it out later
6 0
2 years ago
Casey needed to move 23 huge boxes from his truck to the loading dock. His forklift could only hold three boxes at once. How man
miss Akunina [59]

Answer:

8

Step-by-step explanation:

Since the forklift has a maximum capacity of three boxes per trip, simply divide the total number of boxes (23 boxes) by three and round up to the nearest whole unit to find the number of trips required:

n=\frac{23}{3}=7.667

Casey had to visit the dock 8 times. He moved three boxes in seven trips and two boxes in one trip.

6 0
2 years ago
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