# A level maths help ASAP pleaseWatch

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#1
1) The discrete random variable X has probebility function

P(X=x) = {k(x^2 - )
0

x = 4,5,6 otherwise

Where k is a positive constant

A) show that k= 1/50

B) Find the probebility distrubution of X
0
#2
Help plez
0
8 months ago
#3
(Original post by JamesB8)
1) The discrete random variable X has probebility function

P(X=x) = {k(x^2 - )
0

x = 4,5,6 otherwise

Where k is a positive constant

A) show that k= 1/50

B) Find the probebility distrubution of X
Work out P(X=4), (X=5) and (X=6) in terms of k
What is the sum of all possible probabilities?
0
8 months ago
#4
sub the x's into the function, add all of them together, the sum of all probabilities must equal 1. now 50k=1 do a bit of rearranging to get the answer. For part b, put it into table format
0
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