You started on a bike trip, riding at a rate of 9 miles per hour. your friend left one hour later and rode at the rate of 12 miles per hour. how long did it take your friend to catch up with you?

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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answer: it is d

step-by-step explanation: