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ehidna [41]
3 years ago
8

7 girls and 5 boys in the seventh grade and 3 girls and 9 boys in the eighth grade. teacher randomly selects a seventh grader an

d an eighth grader. what is the probability that the students selected are both girls?
Mathematics
1 answer:
seropon [69]3 years ago
5 0
10 out of 24, or in simpler terms, 5 out of twelve
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I need an explanation how to do this ASAP I will give you 20 POINTS!!
mars1129 [50]
For the first digit you are choosing from 2 digits
for the second digit you are choosing from 2 digits
for the third digit you are choosing from 2 digits
2*2*2=8
111
110
011
101
000
001
100
010
However......
A number doesn't usually start with a 0 or 0s.
Therefore, if you want 3-digit numbers and not just permutations using 0 and 1, then you must eliminate
011, 000, 001, and 010
Seeing that the first digit can't be 0, you choose from 1, then 2, and then 2 digits again; 1*2*2=4 numbers
You choose which answer best suits your problem.
6 0
2 years ago
Ed fills his water bottle with 1.2 liters of water. After his bike ride ,he drinks 200 millimeters of the water . How much is le
olchik [2.2K]

Answer:

1 Litre

Step-by-step explanation:

Convert to similar units. 1.2L = 1,200 ml

1200 - 200 = 1000 or 1L

1 litre of water is left in his water bottle

4 0
2 years ago
Simplify: <br> 3(n-2) <br><br> whats the answer?
Pie

Answer: 3n-6

Step-by-step explanation: You have to use the distributive property. 3 times n is 3n and 3 times -2 is -6.

3 0
2 years ago
{0.2x+0.6y=3.6 0.4x-0.9y=-1.2} what is the answer
MariettaO [177]

Answer:

68266==874624./4

Step-by-step explanation:

77353877473=287365-2874662kkh=2875

4 0
1 year ago
Ms. Carey is planning to host a neighborhood picnic. To make sure she had enough ingredients, she was making a table of possible
lukranit [14]

Answer:

5 and 48

Step-by-step explanation:

27:45

Simplify the ratio

3:5

The first one must be 5, and option 1 (5 and 48) is the only one with 5.

6 0
2 years ago
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