Thirteen earthquakes were measured using the richter scale. their magnitudes are listed below. what is the range for this data set? 8.2, 7.4, 5.9, 8.3, 6.2, 5.1, 7.6, 6.7, 8.1, 7.4, 6.5, 8.7, 5.6 a. 2.0 b. 2.6 c. 3.1 d. 3.6

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

happy to

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if you are saying purchasing 3 social media ads and one newspaper ad counts as one purchase then there are:

6 purchases

if you are asking how many of each then:

18 social media ads

6 newspaper ads