Five horses are in a race. Mr A selects two of the horses at random and bets on them. The probability that Mr A selected the winning horse is

Solution :

The probability that Mr A selected the lossing horse

= $4\over 5$ $\times$ $3\over 4$ = $3\over 5$

The probability that Mr A selected the winning horse

= 1 – $3\over 5$ = $2\over 5$

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