raprocksbob
19.02.2020 •
Mathematics
A school requires students to wear uniforms. if a student randomly selects one item from each of the following categories, then what is the probability they will be wearing all navy with the following items? 2 cardigans one grey, one navy. 4 polos one white, one navy, one maroon, one black. 2 bottoms one khaki, one navy?
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Ответ:
Terry's after amount = 3x + 220
Faye's after amount = 5x - 300
3x + 220 = 5x - 300
-2x = -80
x = 40
altogether initially = 3(40) + 5(40)
= £320.