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Question

Before a race the chances of three runners, A,B,C, were estimated to be proportional to 5,3,2; but during the race A meets with an accident which reduces his chance to one-third. What are now the respective chances of B and C?

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Solution

Before the race, A's chances of losing =310210=12

After the accident, A's chances of losing =113=23

A's chances of lossing has increased in the ratio 43

Hence, B's and C's chances of winning has also increased in the same ratio.

B's new chances of winning =310×43=25

and C's new chances of winning =210×43=415

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