exam Maths Puzzle Numerical Ability

(-7) - (-5) =

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The odds against a horse winning the race are 6 to 5. What is the probability of the horse winning the race? what is the answer to A grocer mixes two kinds or nuts. One kind costs $5.00/kg and the other $5.80/kg. How manykilogramsof each type are neededto make 40kg of a blend worth $5.50.