In order to attract customers, Shijingshan Wanda Plaza, a restaurant launched a carousel lucky draw discount activities, as shown in the figure is free to rotate the carousel, the carousel is divided
In order to attract customers, Shijingshan Wanda Plaza, a restaurant launched a carousel lucky draw discount activities, as shown in the figure is free to rotate the carousel, the carousel is divided into several
| ∵ the first prize is located in the fan of the central angle of the circle of 45 ° + 45 ° / 2 = 3 / 2 × 45 °, And the first prize, the second prize, the third prize **** occupies 360 °, to get a discount of 10% to get the First prize, ∴ rotate the carousel once to be able to get 10% discount probability = 3/2 × 45 ° / 360 ° = , The choice of C. |