There are 11 boys and 5 girls that tried out to sing a duet in a chorus concert. If the director must choose two, what is the probability that both students chosen are boys? (Solve using combinations)

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

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step-by-step explanation:

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3100

step-by-step explanation: