exam
Maths Puzzle
Numerical Ability
How many different four-digit numbers can be formed from the digits 0 through 9 if the first digit must be even and cannot be zero?
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exam Other Question
(x+5)(3x-1)+13=0
2x^2+3x=20
A sample of 25 electric motors is taken from a large lot. The average current drawn by each motor at rated speed and RPM is 7.65 amps. The standard deviation of the sample is 0.1