book Maths Puzzle Numerical Ability

Solve fot t: 2t+7 is greater than t+15 and 5t+6 is greater than or equal to 2t+12

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book Other Question

find three consecutive odd integers such that four times the sum of the first and third integer is five more than the product of three and the second interger If the mean and the stadard deviation of a continuous random variable that is normally distributed are 50 and 4, respectively, find an interval that contains 58% of the distribution.