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Authoritative PPT Summary
"Possibility" Possibility PPT courseware
teaching objectives
1. Experience the process of picking chess pieces from boxes with different numbers of black and white chess pieces, and feel the possibility of random phenomena occurring.
2. Know the possibility of random phenomena occurring, and be able to qualitatively describe the possibility of some simple events.
3. Actively participate in the activity of touching chess pieces, and develop the ability to reason logically in the process of analyzing and describing possibilities based on statistical data.
Touch the chess piece.
(1) Each student in the class randomly picks out a chess piece from the box above, writes down what color it is, then shakes it up, and another student touches it again. Record the results of the whole class's touching in Table (1).
(2) Change the number of black chess pieces and white chess pieces in the box, and then touch. Record the results in Table (2).
What did you find from the data on the chess pieces?
The number of times the black pieces are drawn out exceeds the number of times the white pieces are drawn out.
Can you explain why there are so many black pieces?
practice
1. Draw a ball from each of the five boxes, and connect the possible results of touching the ball with a line.
2. There are several red, yellow and white balls. According to the requirements of touching the balls, put 6 balls in each box below. How should they be placed?
(1) The ball drawn out from box No. 1 must be a white ball.
(2) The probability of drawing a red ball, a yellow ball, and a white ball from box No. 2 is equal.
(3) The yellow ball is more likely to be found from box No. 3 than the red ball.
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