Another bag of marbles contains 6 blue marbles and 1 green marble.  Mary and Frank will draw a blue marble followed by a green marble, without replacing the first marble.  Mary says the probability will be 6/49, and Frank says that the probability will be 1/7.  Who is correct?  Explain and justify your answer by showing work.

Arefrigeration system at your company uses temperature sensors fixed to read celsius (°c) values, but the system operators in your control room understand only the fahrenheit scale. you have been asked to make a fahrenheit (°f) label for the high temperature alarm, which is set to ring whenever the system temperature rises above –10°c. what fahrenheit value should you write on the label?