I need help to solve a math problem: 2c(-8c+-3)+7y-5y?

−16c2−6c+2y

Step-by-step explanation:(2c)(−8c)+(2c)(−3)+7y+−5y

=−16c2+−6c+7y+−5y

=−16c2+−6c+7y+−5y

=(−16c2)+(−6c)+(7y+−5y)

=−16c2+−6c+2y

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

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