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2 January, 10:10

There are white, and red boats in a marina. Two-thirds of the boats in the marina are white, 4/7 of the remaining boats are blue, and the rest are red. If there are 15 ref boats, how many boats are there in the marina?

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  1. 2 January, 10:30
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    105 boats

    Step-by-step explanation:

    Let x be the total number of boats in the marina.

    If Two-thirds of the boats in the marina are white.

    Fraction of the remaining boat = 1-⅔ = ⅓

    4/7 of the remaining boats are blue.

    4/7 of ⅓ are blue

    4/7 X ⅓ = 4/21 are blue

    Fraction of Red Boats =

    1 - (Proportion of white Boats + Proportion of Blue Boats)

    = 1 - (2/3+4/21) = 1/7

    If there are 15 red boats,

    1/7 of the total boats = 15

    1/7 X x=15

    x=15X7

    x=105

    There are 105 boats in total on the marina
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