Answer: I believe you are correct I got the same answer as you.
To find the mean you add up all the numbers, then divide by how many numbers there is.
so for 6th grade you would add up 2+3+3+3+3+4+4+5+5+5+5+6+6+6+6+6+7+9+10+10=?
and then divide that by 20.
same with 8th grade.
and then you would subtract one from the other
Given the table below which shows the result of a survey that asked
2,856 people whether they are involved in any type of charity work.
Part A:
If a person is chosen at random, the probability that the person is
frequently or occassinally involved in charity work is given by:
Part B:
If a person is chosen at random, the probability that the person is female or not involved in charity work at all is given by:
Part C:
If a person is chosen at random, the probability that the person is male or frequently involved in charity work is given by:
Part D:
If a person is chosen at random, the probability that the person is
female or not frequently involved in charity work is given by:
Part E:
The events "being female" and "being frequently involved in charity
work" are not mutually exclusive because being a female does not prevent
a person from being frequently involved in charity work.
Indeed from the table, there are 205 females who are frequently involved in charity work.
Therefore, the answer to the question is "No, because 205 females are frequently involved charity work".
I can’t see the tea really good