An engineer must decide whether to build a road that climbs a hill or goes around it. To do so, he
must determine the angle of elevation from
horizontal ground to the top of the hill. To the
nearest degree, determine the angle of elevation of
this hill.
: 75 ft
45 ft

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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