Question

The amount of time Ricardo spends brushing his teeth follows a Normal Distribution with unknown mean and standard deviation. Ricardo spends less than one minute brushing his teeth about 40% of the time. He spends more than two minutes brushing his teeth 2% of the time. Use this information to determine the mean and standard deviation of this distribution.

Answer 1

THE ANSWER IS 42 I THINK THAT HE DONE IT 42 TIMES AND THAT IS SO GOOD HE HAD 42 MIN ON THE CLOCK HE DONE PRETTY GOOD YOU ARE AT LEAST TO DO IT 3 TIMES A DAY MORNING ,AFTERNOON AND THE EVENING THAT IS PRETTY DANG GOOD