Which of the following statements is false regarding randomization? i)   randomization allows each member of the population to have an equal probability of being selected for the sample population.     ii)   randomization avoid bias.     iii)   randomization protects against unknown factors.     iv)   randomization can be replaced by accurately matching the sample to the population.     v)   randomization allows one to draw inferences about a population through a sample.

Ab and bc form a right angle at point b. if a= (-3,-1) and b= (4,4) what is the equation of bc?

It is given that the quadratic equation hx²-3x+k=0, where h and k are constants, has roots [tex] \beta \: and \: 2 \beta [/tex]express h in terms of k

Each person in an it department of 25 people works on at least one of 3 major projects: system security, program implementation, platform development. 10 people work on system security, 13 work on program implementation, and 12 work on platform development. 4 people work on system security and platform development, 5 people work on program implementation and platform development, and 2 people work on all three projects. how many people work on system security and program implementation?