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27.07.2021 •
Mathematics
Trọng lượng X của một loại trái cây có phân phối chuẩn với phương sai là 16gam2. Trái cây đạt tiêu chuẩn xuất khẩu khi có trọng lượng sai lệch so với trọng lượng trung bình không quá 5gam. Tỷ lệ trái cây đạt tiêu chuẩn xuất khẩu là:
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Ответ:
you may try to draw a picture to work out the question
The question require the knowledge of Pythagorean Theorem
Sara walked up 4miles per miles for 2hours .Therefore ,she walked 8miles in total.
her sister walked to the right 3miles per hours for 2hours.Therefore ,she walked 6miles in total .
the distance is
6^2+8^2=x^2
x=10
therefore the answer is B