# AS maths help

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Thread starter 4 weeks ago
#1
Hi, I really need help on this question - i have no clue where to start. It’s an AS statistics question.

In a game, a player can score 0, 1, 2, 3 or 4 points each time the game is played.
The random variable S, representing the player's score, has the following probability distribution where a, b and c are constants.

S 0 1 2 3 4
P(S=s) a b с 0.1 0.15
(This is a probability table)

The probability of scoring less than 2 points is twice the probability of scoring at least 2 points.
Each game played is independent of previous games played.
John plays the game twice and adds the two scores together to get a total.
Calculate the probability that the total is 6 points.
Last edited by Mb12345678; 4 weeks ago
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2 weeks ago
#2
As it is a question about maths, I moved it from football to the maths forum for you!

If I got a clue, I will give you an answer.
0
2 weeks ago
#3
First you need to find the values of a,b,c. You know the sum of probabilities must be 1. Use the fact that they've given you two probabilities to get a total of 3 equations in 3 unknowns (a,b,c) this will start you off
Last edited by Y1_UniMaths; 2 weeks ago
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