Answer:
The mean is 30 and there are 2 patients over this age.
Step-by-step explanation:
Add up 27+13+16+20+41+9+84=210
Then divide by the amount of numbers "7" so
210/7 is 30.
There are 2 patients over the age of 30.
Make sure that you are correct and do the problem twice.
Answer:
25 mL
Step-by-step explanation:
You subtract the amount of water in the cylinder with the rock, from the amount of water in the cylinder without the rock. The equation is 75mL - 50 mL
Answer:
Option: C is the correct answer.
C. Buying a needle and buying thread are dependent events.
Step-by-step explanation:
let A denotes the events of buying a thread.
and B denote the event of buying a needle.
Then A∩B denote the event of buying a needle and a thread.
Also let P denote the probability of an event.
i.e. we are given:
P(A)=0.15
Also P(B|A)=0.25
As we know that:

As we know that when two events A and B are independent then,
P(A∩B)=∅
otherwise they are dependent events.
Hence, option: C is the correct answer.