A box contains 1 red ball and 3 white balls. Balls are Selected at random, one after another without re-
placement, and their colors are noted, until the red
ball is selected. A random variable X is defined as the
total number of balls selected. Find the density func-
tion of X.

b. 6

step-by-step explanation:

we are given the table representing an exponential function.

we can see from the table that, as x is increasing, the value of y is increasing in the power of 6.

i.e. the following relation is obtained,

x = 1, y = 6

x = 2, y = 36 =

x = 3, y = 216 =

x = 4, y = 1296 =

x = 5, y = 7776 =

so, the geometric series obtained is .

thus, the common ratio is given by = = 6.

hence, the common ratio is 6.

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answer: need a picture

step-by-step explanation: