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With a coin, the chance of throwing a cross is 0.3 and the chance of throwing head is 0.25. Calculate the probability that you will get the same result twice if each coin is rolled once

How do you the relative intensity of red light with 1/λ^4? because relative intensity if blue light is 5,8. en if i do calculate that with the formula i get 1/(700)^4= 2,...

There are 4 people and 4 marbles (3 white and 1 black) . Each take one marbles. What is the chance that the ball first person takes is black, the second person takes is black... .

Stef and marieke play a gambling game. Marieke throws a coin and wins if she throws 'head'. Stef throws a dice and wins if he rolls '6'. They take turns playing. Marieke starts, then Stef and so on until one of them wins. 1.Calculate the probability that...

Then p(second person takes black)= 3/4* 1/3* 2/2*1/1=1/4

How can i draw this situation?