Question

A math teacher gave her class two tests. Twenty-five percent of the class passed both tests and 42 percent of the class passed the first test. What percent of those who passed the first test also passed the second test?
Answer

5%

10.5%

15.5%

25%

Question 49

The probability that it is Friday and that a student is absent is 0.03. Since there are five school days in a week, the probability that it is Friday is 0.2. What is the probability that a student is absent given that today is Friday?
Answer

0.10

0.15

0.20

0.25

Answer 1

i think the answer to 1 is (25%) but im not sure about 2

Answer 2

@Mariam.A

Answer 3

Can someone just help me plzzzzzzzzzzz

Answer 4

Question 49
Let F be the event 'it is Friday' and let A be the event 'student is absent'.
\[\large P(F \cap A)=0.03\]
It is given that
\[\large P(F)=0.2\]
Therefore
\[\large P(A)=\frac{P(F \cap A)}{P(F)}=\frac{0.03}{0.2}=you\ can\ calculate\]

Answer 5

is the answer 0.15?

Answer 6

Yes, you are correct.

Answer 7

yes kropot72 i have a few more Q's can u help me answer them too?

Answer 8

for the second on use conditional probability rule
P(A/F)=P(A and F)/P(A)
=0.03/0.2
=0.15

Answer 9

@MeggyMeg Sorry, I must log out now :(

Answer 10

oh its okay :]

Answer 11

im gonna give u a medal

Answer 12

Mariam can u helo me?

Answer 13

yeah I'll try m not a probability genius but I think I can manage :)

Answer 14

ok thank you so much

Answer 15

What is the mode of this set of data: 10, 11, 11, 12, 12, 12, 15, 15, 19, 20, 21, 22, 22?
Answer

10

12

13

15
1 points
Question 37

A football player ran the ball for 40 yards, 45 yards, 48 yards, 52 yards, and 105 yards. What is the outlier?
Answer

105

52

40

65
1 points
Question 38

A student had the following scores on quizzes: 26, 28, 34, and 37. What score would be needed on one additional quiz for this student to have a mean score of 31?
Answer

30

31

34

38

Answer 16

u dont have to answer question 1 i know that one

Answer 17

ok
for the second one the outlier is usually the number out of place or way out of the rest of the group, so from this definition which one do you think it should be?

Answer 18

is it a 105?

Answer 19

yep

Answer 20

for the last one add up all the score and make the unknown score x, then divide this by the number of score equating it to 31 to make a formula like this\[\frac{ 26+28+34+37+x }{ 5 }=31\]

Answer 21

try solve this and let me know how you go

Answer 22

I mean solve for x which would be the additional score needed