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The probability of birth in the same month is ______(the default number of days per month is the same, and the result is accurate to 0.001) for at least 2 of the 9 students randomly selected.
It is understood that that subject is a classical sketch,
Number of events included in test occurrence:129,
At least two students were born in the same month and the opposite event was that no one's birthday was born in the same month.
Probability of required event is 1-A
9
12
129=1-3850
248832=0.985,
Therefore, the answer is:0.985
It is a classical sketch,
Number of events included in test occurrence:129,
At least two students were born in the same month and the opposite event was that no one's birthday was born in the same month.
Probability of required event is 1-A
9
12
129=1-3850
248832=0.985,
Therefore, the answer is:0.985
Mathematical Quick Calculation and Skillful Calculation TAT 1/8+1/24+1/48+.+1/360
0
Adding and subtracting vectors The book says that vectors can not be added or subtracted directly, but when we calculate the resultant force of an object, do we need to add or subtract two forces? Why not? In other words, he couldn't use the arithmetic method to add or subtract. For other methods, please introduce them. Addition and subtraction of vectors The book says that vectors can not be added or subtracted directly, but when we calculate the resultant force of an object, we add or subtract two forces. Why not? That is to say, you can't add or subtract with arithmetic method. Please introduce other methods. Addition and subtraction of vectors The book says that vectors can not be added or subtracted directly, but when we calculate the resultant force of an object, we have to add or subtract two forces. Why not? That is to say, you can't add or subtract with arithmetic method. Please introduce other methods.
They are obviously vectors on the same line, and they can be added or subtracted.
Otherwise the parallelogram principle is used, and a rectangular coordinate system is also used.
In linear motion, what parallelogram rule is used to add and subtract vectors?
0
How to add and subtract the rotation vector by parallelogram rule?
0
How to Weld Two Figures in AI For example, a circle and a rectangle are welded into a shape
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