The odds of an event occurring are :. Find (a) the probability that the event will occur and (b) the probability that the event will not occur.

Event a has the probablitity of 50% that it will happen and event b has the same. you have the probability of 50% of choosing a or b

Step-by-step explanation:

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use an equation of ratios to determine the amount of gas needed to fill the tank.

    0.2             0.8

  =    

288.75             x

                                                              231 gal

so, 0.2x = (0.8)(288.75 gal), and x = = 1155 gal.

                                                                0.2

it would take 1155 gal. to fill the tank.

the cost would be

1155 gal         $3

* = $3465   (answer)

      1           1 gal

hope this you