STATISTICS

Statistics



Statistics

Assume 20% of the population has blonde hair and 45% have brown hair. If someone is selected at random from this population, what is the probability that he or she has either blonde hair or brown hair?

Formula for Probability

= (0.20) + (0.45)

= 0.65

Assume 20% of the population is left-handed and 50% have blue eyes. If one person is selected at random from the population find the probability that the person chosen is left-handed and has blue eyes.

= (0.20) (0.50)

= 0.1

The probability that a floppy disk is still in good order after a year is 75%. If ...