Determine whether the infinite geometric sequence is convergent or divergent. If it is convergent, find its sum. a) 5/2 - 25/4 + 125/8 - ...
b) -2/3 + 4/9 - 8/27 + ...

i'm assuming it's looking for the missing length, which should be 4cm

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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

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