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lina2011 [118]
2 years ago
12

Martin has a pencil case which contains 4 blue pens and 3 green pens. Martin picks a pen at random from the pencil case. He note

s its colour, and then replaces it. He does this two more times. Work out the probability that when Martin takes three pens, exactly two are the same colour. (3 marks)
Mathematics
2 answers:
Pavlova-9 [17]2 years ago
8 0

Answer:

How does this make sense? What are you asking?

Step-by-step explanation:

adoni [48]2 years ago
6 0

Answer: How do you not understand this?

I understand it perfectly.

Step-by-step explanation:

You might be interested in
The sum of three consecutive numbers is 51. What are the three numbers
bixtya [17]

Answer: 16,17,18

Step-by-step explanation: 16,17,18 are consecutive numbers and when you add them up the equal 51

6 0
2 years ago
How to do this ?<br> Don’t understand it
riadik2000 [5.3K]
X=y+3
<span>-5x-4y=<span>30
-------------------
Substitute y + 3 for x in </span></span>-5x-4y=30
<span><span>-5<span>(y+3)-</span></span>4y</span>=<span>30
</span>-9y-15=<span>30
</span>----------------------------
Add 15 to each side
<span><span>-9y-15</span>+15</span>=<span>30+<span>15
-9y = 45
</span></span>-----------------------------------
Divide each side by -9
-9y ÷ -9 = 45 ÷ -9
y = -5
Now we solve for x
====================================================================
Substitute -5 for y in x = y + 3
x=-<span><span>5</span>+<span>3
</span></span>x = -2
----------------------
(-2,-5) is your answer


7 0
3 years ago
Please help me asap!!
sukhopar [10]

Answer:

triangle DCA is congruent to triangle BAC       -      because of AAS (angle-angle-side) theorem

Step-by-step explanation:

8 0
3 years ago
Juan's family and Ethan's family go to a food stand.
Rasek [7]

Answer:

1 hotdog is $3.5.

1 drink is $2.

Step-by-step explanation:

18.50= 3x+4y(times 5)

25.50=5x+4y(times -3)

92.5=15x+20x

-76.5=-15x+-12y

16=-8y

2=y

18.50=3x+4(2)

10.50=3x+8

10.50=3x

3.5=x

           

3 0
2 years ago
Jessica drew a circle divided into 8 equal parts she shaded six of the parts what fraction is equivalent to the part of the circ
Anni [7]

Answer:

3/4

Step-by-step explanation:

Jessica shaded 6/8 of the circle. That fraction can be reduced by removing a factor of 2 from numerator and denominator. The reduced fraction is 3/4.

\dfrac{6}{8}=\dfrac{2\cdot 3}{2\cdot 4}=\dfrac{2}{2}\cdot\dfrac{3}{4}=1\cdot\dfrac{3}{4}\\\\=\dfrac{3}{4}

3 0
3 years ago
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