So, we know that:

We also know that
. We will use that fact to find
in terms of
and
.

Therefore:

Answer:
69, nice
Step-by-step explanation:
118-49=69
False. The frequency curve for a distribution can be obtained by drawing a smooth and free hand curve through the midpoints of the upper sides of the rectangles forming the histogram.
I apologize, but we would need the chart included below the questions to be able to answer this.