Two lenghts are in the ratio 7: 8. if the first lenght is 273m, what amount is the second lenght

312 m

Step-by-step explanation:

Write and solve an equation of ratios:

 7       273 m

=

 8            x

Then 7x = 8(273 m) = 2184 m

and x = 2184 m / 7 = 312 m

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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