Please answer or i loose grades

28

Step-by-step explanation:

To complete the task in 30 days, they need at least 4 people working 7 hours.

( 4 x 7 = 28 hrs/day, 28 hrs/day to complete in 30 days, 28 x 30 = 840 hrs total to complete in 30 days. )

The company decides to have 5 people working 6 hours a day.

( 5 x 6 = 30 hrs/day, ? days to complete, must be 840 hours (30 day time span) to finish.   = 28. )

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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