Races and Games Practice Test 1 with solutions

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Question : 37 of 40

Marks: +1, -0

In a game of billiards, if A can give B 10 points in 50 and A can give C 10 in 80, how many points can C give B in a game of 70?

20 points
17 points
10 points
7 points
13 points

Solution:

The required answer =

z({yx_1-xy_1}/{x(y-y_1)})p

z = 70, y = 80,

x_1

= 10,

y_1

= 10, x = 50
=

70({80×10-50×10}/{50(80-20)})

=

70({800-500}/{50×60})

=

70 × {300}/{3000}

=

{21000}/{3000}

= 7 points

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