The benefits of the negative stain include:

Mark all that apply:

• No shrinkage or distortion of cells due to no heat fixing
• Because the cells don't take up stain they don't get shrunk or distorted
• One can more accurately determine cell size and shape because the cells stand out against the background
• One can more accurately determine the cell size and shape because there is no shrinkage or distortion of cells
• Negatively charged dyes are safer to work with than positively charged dyes.

Find the probability that when a couple has three children, at least one of them is a girl. (Assume that boys and girls are equally likely.)

Find the probability of a couple having a baby girl when their third child is born, given that the first two children were both girls. Is the result the same as the probability of getting three girls among three children?

Assuming that boys and girls are equally likely, find the probability of a couple having a boy when their third chi ld is born, given that the first two children were both girls.

Find the probability of a couple having a baby girl when their sixth child is born, given that that the first five children were all girls. Assume boys and girls are equally likely. Is the result the same as the probability of getting all girls among six children.

When testing for current in a cable with five color-coded wires, the author used a meter to test two wires at a time. How many different tests are required for every possible pairing of two wi.res?