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KIM [24]
3 years ago
15

Twenty-five cards are numbered from 1 to 25 and placed in a box. One card is selected at random and not replaced. Another card i

s randomly selected. What is the probability of selecting two even numbers?
Mathematics
1 answer:
LuckyWell [14K]3 years ago
6 0

Answer:

11/50

Step-by-step explanation:

In draw 1,

Favourable outcome / Total number of possibilities = 12/25

In draw 2,

Favourable outcome / Total number of possibilities = 11/24

Total chance of getting 2 even numbered cards = 12/25 * 11/24 = 11/50

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MissTica

Answer:

Step-by-step explanation:

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2 years ago
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Need help with this<br>​
AleksandrR [38]

Step-by-step explanation:

\cos( \beta  )  +  \sin( \beta )  \tan( \beta )  =  \sec( \beta )

\cos( \beta )  +  \sin( \beta )  \frac{ \sin( \beta ) }{ \cos( \beta ) }

\cos( \beta )  +  \frac{ \sin {}^{2} ( \beta ) }{ \cos( \beta ) }

\frac{ \cos {}^{2} ( \beta ) }{cos \beta }  +  \frac{ \sin {}^{2} ( \beta ) }{ \cos( \beta ) }

\frac{1}{ \cos( \beta ) }

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3 years ago
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If a car travels 640 miles in 11 hours, what is the average rate (speed) of the car?
sergij07 [2.7K]
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5 0
3 years ago
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Island A is 160 miles from island B. A ship captain travels 220 miles from island A and then finds that he is off course and 200
Angelina_Jolie [31]

Answer:

=135.53°

Step-by-step explanation:

The bearing that the captain should turn is the angle difference between the two islands from the position of the ship.

Let C be the position of the ship, then

AB is c=160

AC is b=220

BC is a=200

We use the cosine rule as follows:

c²=a²+b²-2ab Cos C

160²=200²+220²-2×200×220 Cos C

25600=88400-88000Cos C

88000 Cos C=88400-25600

88000Cos C=62800

Divide both sides by 88000.

Cos C=62800/88000

=0.7136

C=44.47°

He should turn (180°-44.47°)=135.53°

3 0
3 years ago
Please solve the questions
Wewaii [24]

Answer:

Step-by-step explanation:

For a

2 + x = 15

x = 15 -2

x = 13

For B

x - 12 = 14

x = 12 + 14

x = 26

For C

3x = 12

x = 12/3

x = 4

Hope it helps:)

5 0
3 years ago
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