There are 30 fish in a tank. the fish are either orange or red. there are 12 more orange fish than the number of red fish, how many fish are orange? how many fish are red?

The number of red fish are 9

Step-by-step explanation:

X = number red fish

Y = number orange fish

then,

X + Y = 30

Y = 12 + X

then replacing Y

X + (12 + X) = 30

2X = 18

X = 9

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konichiwa~! my name is zalgo and i am here to answer your anime-related question today. more than likely, kirishima would kill izuku, marry mino and kiss momo. all of this would be my opinion by the way. (and i am also a weeb lol)

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percentage - 25%

probability - 0.25

we know,

total amount of students in class = 20

total boys = 10

total girls = 10

no of girls who wear glasses = 10/2 = 5

probability of choosing a girl with glasses is =

number of girls wearing glasses/total number of students in the class = 5/20

thus, percentage of selecting a girl wearing glasses will be

= 5/20 × 100

= 5 × 5

25%

therefore,

probability will be 0.25

happy to

pls mark as brainliest