A swim coach is considering 10 swimmers as possible members of a 4-person relay team. a) How many different choices of 4 swimmers does the coach have?
b) Given that the relay team's performance may depend on what order the athletes swim in, how many different teams could the coach create?

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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step-by-step explanation: hi!

30,40,50 is correct answer

yeah i know the problem you need. i am taking it right now. the answer is step 3

~mickey