Each student in Mrs. Abramson’s class chose a ticket out of a bag. In the bag were 7 red tickets, 4 green tickets, and 3 yellow tickets. What was the probability of the first student picking a yellow ticket, putting it back, and then the second student picking a green ticket?

Step-by-step explanation:

We know that the heron wingspan follow a normal distribution with an mean of 125 cm.

In this case we seek to find

If X is a random variable that represents the length of the heron wingspan, then X follows a normal distribution and therefore is a continuous random variable.

Then by definition of continuous random variable we have to:

where a is a constant.

That is to say that only the ranges of values can have a different probability of zero. The probability that a continuous random variable is equal to some exact value is always zero.

Finally we can conclude that