Subtract t the first 2 choices from the total time:
10 - 3.2 - 3.5 = 3.3
The 3rd selection needs to be 3.3 minutes long
Answer:
480
Step-by-step explanation:
because 120×4=480 if im correct
Graphs..?
We have the formula
From the above formula,
That is variance of Y is 49 not 7.
Hence the statement is (b) False