1. Identify whether the following random variables is discrete or continuous.
a quantity of red cars passing by the road.
b. volume of citric acid solution in a cylinder.
c.length of gum as is stretches
d. number of times yellow light appears in stoplight in an hour.
e. duration of traffic from Magallanes to Cubao.

2. Three coins are tossed and the random variable Z gives the number of tails. Determine the following:
a. Z(HHT)
b. Z(TTH)
c. Z(HTH)
d. Z(TTT)​