trong kỳ thi, an thi hai môn: toán và văn. Xác suất an đậu môn toán là 0,90; xác suất an đậu môn văn là 0,81 và xác suất an đậu cả hai môn là 0,74. Xác suất An rớt ít nhất một môn là

answer: the answer is one of

step-by-step explanation:   we are given to write a proper fraction where the whole is divided into an even number of equal parts less than ten, and an odd number of those parts exist.

an even number less than 10 may be one of 2, 4, 6 or 8. so, the whole may be one of these four evens.

now, an odd number of these parts must exist, so the numerator must be an odd number, one of 1, 3, 5 or 7. it cannot be 9 because then the fraction will become improper.

thus, our fraction may be one of the following

correct answers below:

more detail

step-by-step explanation:

22.83 repeating

step-by-step explanation:

137 ÷ 6 is 22.8333333 therefore we understand that 3 is repeating.

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